diff --git a/src/book/mod.rs b/src/book/mod.rs
index c6ed943f..939dc67b 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -496,6 +496,46 @@ impl MDBook {
             None => {},
         }
 
+        // Find a translation for the links that are still None
+
+        for (key, trl) in final_links.clone().iter() {
+            match trl.link {
+                Some(_) => { continue; },
+                None => {},
+            }
+
+            let b: &Book = self.translations.get(key).unwrap();
+            let flat_toc = toc::flat_toc(&b.toc);
+
+            for item in flat_toc.iter() {
+                match *item {
+                    TocItem::Numbered(ref i) |
+                    TocItem::Unnumbered(ref i) |
+                    TocItem::Unlisted(ref i) => {
+
+                        // Note that this will also add a link to itself, which is good.
+
+                        if content.is_it_a_translation_of(i) {
+                            if let Some(mut a) = i.chapter.get_dest_path() {
+                                // Join the path to the language code, i.e. en/tears.html
+                                a = PathBuf::from(key.to_string()).join(a);
+                                let path = String::from(a.to_str().unwrap());
+
+                                final_links.insert(
+                                    key.to_owned(),
+                                    TranslationLink::new_with_link(key.to_owned(), path)
+                                );
+                            } else {
+                                debug!("It's a translation but dest_path is not set: {:#?}", i);
+                            }
+                            break;
+                        }
+                    },
+                    TocItem::Spacer => {},
+                }
+            }
+        }
+
         let a: Vec<TranslationLink> = final_links.values().map(|x| x.clone()).collect();
         newcontent.chapter.translation_links = Some(a);
 
@@ -640,3 +680,4 @@ impl MDBook {
     // }
 
 }
+
diff --git a/src/book/toc.rs b/src/book/toc.rs
index 84beaf74..d7510b8b 100644
--- a/src/book/toc.rs
+++ b/src/book/toc.rs
@@ -55,6 +55,28 @@ impl TocContent {
         }
     }
 
+    pub fn is_it_a_translation_of(&self, checking: &TocContent) -> bool {
+        // if the user has set the same translation_id on them
+        if let Some(ref a) = self.chapter.translation_id {
+            if let Some(ref b) = checking.chapter.translation_id {
+                if a == b {
+                    return true;
+                }
+            }
+        }
+
+        // if src_path matches
+        if let Some(ref a) = self.chapter.get_src_path() {
+            if let Some(ref b) = checking.chapter.get_src_path() {
+                if a == b {
+                    return true;
+                }
+            }
+        }
+
+        false
+    }
+
     // TODO update
 
     // /// This function takes a slice `&[x,y,z]` and returns the corresponding sub-chapter if it exists.
@@ -74,3 +96,22 @@ impl TocContent {
     //     }
     // }
 }
+
+pub fn flat_toc(toc: &Vec<TocItem>) -> Vec<TocItem> {
+    let mut flattened: Vec<TocItem> = vec![];
+    for i in toc.iter() {
+        match *i {
+            TocItem::Numbered(ref x) |
+            TocItem::Unnumbered(ref x) |
+            TocItem::Unlisted(ref x) => {
+                flattened.push(i.clone());
+                if let Some(ref subs) = x.sub_items {
+                    let mut a = flat_toc(subs);
+                    flattened.append(&mut a);
+                }
+            },
+            TocItem::Spacer => { flattened.push(i.clone()); },
+        }
+    }
+    flattened
+}
diff --git a/src/tests/book-wonderland-multilang/src/en/long-tale.md b/src/tests/book-wonderland-multilang/src/en/long-tale.md
index dec8091d..d9b5196d 100644
--- a/src/tests/book-wonderland-multilang/src/en/long-tale.md
+++ b/src/tests/book-wonderland-multilang/src/en/long-tale.md
@@ -1,3 +1,7 @@
++++
+translation_id = "caucus race"
++++
+
 # A Caucus-Race and a Long Tale
 
 ![Tail](images/Tail.png)
diff --git a/src/tests/book-wonderland-multilang/src/fr/SUMMARY.md b/src/tests/book-wonderland-multilang/src/fr/SUMMARY.md
index 0ca6d6d6..8dbb9e6f 100644
--- a/src/tests/book-wonderland-multilang/src/fr/SUMMARY.md
+++ b/src/tests/book-wonderland-multilang/src/fr/SUMMARY.md
@@ -3,7 +3,7 @@
 [Titre](titre.md)
 
 - [Au fond du terrier](terrier.md)
-- [La mare aux larmes](larmes.md)
+- [La mare aux larmes](tears.md)
 - [La course cocasse](cocasse.md)
 - [L'habitation du lapin blanc]()
 - [Conseils d'une chenille]()
diff --git a/src/tests/book-wonderland-multilang/src/fr/larmes.md b/src/tests/book-wonderland-multilang/src/fr/tears.md
similarity index 100%
rename from src/tests/book-wonderland-multilang/src/fr/larmes.md
rename to src/tests/book-wonderland-multilang/src/fr/tears.md
diff --git a/src/tests/book-wonderland-multilang/src/hu/SUMMARY.md b/src/tests/book-wonderland-multilang/src/hu/SUMMARY.md
index 2e9daf5a..a66b8c8a 100644
--- a/src/tests/book-wonderland-multilang/src/hu/SUMMARY.md
+++ b/src/tests/book-wonderland-multilang/src/hu/SUMMARY.md
@@ -3,7 +3,7 @@
 [Címoldal](cimoldal.md)
 
 - [Lenn, a Nyuszi barlangjában](nyuszi.md)
-- [Könnytó](konnyto.md)
+- [Könnytó](tears.md)
 - [Körbecsukó meg az egér hosszú tarka farka](tarka-farka.md)
 - [Gyíkocska]()
 - [A hernyó tanácsot ad]()
diff --git a/src/tests/book-wonderland-multilang/src/hu/tarka-farka.md b/src/tests/book-wonderland-multilang/src/hu/tarka-farka.md
index f3617efe..b5b92616 100644
--- a/src/tests/book-wonderland-multilang/src/hu/tarka-farka.md
+++ b/src/tests/book-wonderland-multilang/src/hu/tarka-farka.md
@@ -1,3 +1,7 @@
++++
+translation_id = "caucus race"
++++
+
 # Körbecsukó meg az egér hosszú tarka farka
 
 ![Tarka-farka](images/Tail.png)
diff --git a/src/tests/book-wonderland-multilang/src/hu/konnyto.md b/src/tests/book-wonderland-multilang/src/hu/tears.md
similarity index 100%
rename from src/tests/book-wonderland-multilang/src/hu/konnyto.md
rename to src/tests/book-wonderland-multilang/src/hu/tears.md
diff --git a/src/tests/hbs_renderer_multilang.rs b/src/tests/hbs_renderer_multilang.rs
index 32cb99f6..5ce7ca5a 100644
--- a/src/tests/hbs_renderer_multilang.rs
+++ b/src/tests/hbs_renderer_multilang.rs
@@ -27,7 +27,7 @@ fn it_renders_multilanguage_book() {
 
     chapter_path = proj.get_dest_base().join("index.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
-    assert!(s.contains("<title>Alice's Adventures in Wonderland</title>"));
+    assert!(s.contains("<title>Titlepage - Alice's Adventures in Wonderland</title>"));
     assert!(s.contains("<h1>Alice's Adventures in Wonderland</h1>"));
     assert!(s.contains("<base href=\"\">"));
 
@@ -40,13 +40,13 @@ fn it_renders_multilanguage_book() {
     assert!(s.contains("li><a href=\"en/tears.html\" class=\"active\"><strong>2.</strong> The Pool of Tears</a></li>"));
 
     book_path = proj.translations.get("fr").unwrap().config.get_dest();
-    chapter_path = book_path.join("larmes.html");
+    chapter_path = book_path.join("tears.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
     assert!(s.contains("<h1>La mare aux larmes</h1>"));
     assert!(s.contains("<base href=\"../\">"));
 
     book_path = proj.translations.get("hu").unwrap().config.get_dest();
-    chapter_path = book_path.join("konnyto.html");
+    chapter_path = book_path.join("tears.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
     assert!(s.contains("<h1>Könnytó</h1>"));
     assert!(s.contains("<base href=\"../\">"));
@@ -55,6 +55,15 @@ fn it_renders_multilanguage_book() {
 
     assert!(proj.get_dest_base().join("images").join("Queen.jpg").exists());
 
+    // Test if default translation indexes are displayed
+
+    book_path = proj.translations.get("hu").unwrap().config.get_dest();
+    chapter_path = book_path.join("tarka-farka.html");
+    s = utils::fs::file_to_string(&chapter_path).unwrap();
+    assert!(s.contains("<a href=\"en/index.html\">en</a>"));
+    assert!(s.contains("<a href=\"hu/index.html\">hu</a>"));
+    assert!(s.contains("<a href=\"fr/index.html\">fr</a>"));
+
     // Test if translation links given in the TOML header were rendered
 
     book_path = proj.translations.get("en").unwrap().config.get_dest();
@@ -63,14 +72,23 @@ fn it_renders_multilanguage_book() {
     assert!(s.contains("<a href=\"hu/nyuszi.html\">hu</a>"));
     assert!(s.contains("<a href=\"fr/terrier.html\">fr</a>"));
 
-    // Test if default translation links are set
+    // Test if translation links by translation_id were found
 
-    book_path = proj.translations.get("hu").unwrap().config.get_dest();
-    chapter_path = book_path.join("tarka-farka.html");
+    book_path = proj.translations.get("en").unwrap().config.get_dest();
+    chapter_path = book_path.join("long-tale.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
-    assert!(s.contains("<a href=\"en/index.html\">en</a>"));
-    assert!(s.contains("<a href=\"hu/index.html\">hu</a>"));
-    assert!(s.contains("<a href=\"fr/index.html\">fr</a>"));
+    assert!(s.contains("<a href=\"en/long-tale.html\">en</a>"));
+    assert!(s.contains("<span>fr</span>"));
+    assert!(s.contains("<a href=\"hu/tarka-farka.html\">hu</a>"));
+
+    // Test if translation links by src_path were found
+
+    book_path = proj.translations.get("en").unwrap().config.get_dest();
+    chapter_path = book_path.join("tears.html");
+    s = utils::fs::file_to_string(&chapter_path).unwrap();
+    assert!(s.contains("<a href=\"en/tears.html\">en</a>"));
+    assert!(s.contains("<a href=\"fr/tears.html\">fr</a>"));
+    assert!(s.contains("<a href=\"hu/tears.html\">hu</a>"));
 
     // Test if print.html is produced for each translations
 
diff --git a/src/tests/mdbook_test.rs b/src/tests/mdbook_test.rs
index 1a76138b..b5c6076a 100644
--- a/src/tests/mdbook_test.rs
+++ b/src/tests/mdbook_test.rs
@@ -107,6 +107,7 @@ indent_spaces = 2
 [[translations.en]]
 title = "Alice's Adventures in Wonderland"
 author = "Lewis Carroll"
+is_main_book = true
 
 [[translations.hu]]
 title = "Alice Csodaországban"
@@ -168,10 +169,18 @@ name = "Kosztolányi Dezső"
 
     // Hashmaps are unordered. They don't always print their keys in the same order.
 
+    assert_eq!(result.indent_spaces, expected.indent_spaces);
+
     assert_eq!(
-        format!("{:#?} {:#?} {:#?}", result.indent_spaces, result.translations.get("en").unwrap(), result.translations.get("hu").unwrap()),
-        format!("{:#?} {:#?} {:#?}", expected.indent_spaces, expected.translations.get("en").unwrap(), expected.translations.get("hu").unwrap())
+        format!("{:#?}", result.translations.get("en").unwrap()),
+        format!("{:#?}", expected.translations.get("en").unwrap())
     );
+
+    assert_eq!(
+        format!("{:#?}", result.translations.get("hu").unwrap()),
+        format!("{:#?}", expected.translations.get("hu").unwrap())
+    );
+
 }
 
 #[test]
diff --git a/src/tests/summary_test.rs b/src/tests/summary_test.rs
index 8e882ba5..8042fbf3 100644
--- a/src/tests/summary_test.rs
+++ b/src/tests/summary_test.rs
@@ -46,6 +46,7 @@ fn it_parses_summary_to_tocitems() {
                     "index.html"
                 ),
                 translation_links: None,
+                translation_id: None,
                 authors: None,
                 translators: None,
                 description: None,
@@ -67,6 +68,7 @@ fn it_parses_summary_to_tocitems() {
                     "README.html"
                 ),
                 translation_links: None,
+                translation_id: None,
                 authors: None,
                 translators: None,
                 description: None,
@@ -92,6 +94,7 @@ fn it_parses_summary_to_tocitems() {
                     "cli/cli-tool.html"
                 ),
                 translation_links: None,
+                translation_id: None,
                 authors: None,
                 translators: None,
                 description: None,
@@ -111,6 +114,7 @@ fn it_parses_summary_to_tocitems() {
                                     "cli/init.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -137,6 +141,7 @@ fn it_parses_summary_to_tocitems() {
                                     "cli/build.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -163,6 +168,7 @@ fn it_parses_summary_to_tocitems() {
                                     "cli/watch.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -189,6 +195,7 @@ fn it_parses_summary_to_tocitems() {
                                     "cli/serve.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -215,6 +222,7 @@ fn it_parses_summary_to_tocitems() {
                                     "cli/test.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -250,6 +258,7 @@ fn it_parses_summary_to_tocitems() {
                     "format/format.html"
                 ),
                 translation_links: None,
+                translation_id: None,
                 authors: None,
                 translators: None,
                 description: None,
@@ -269,6 +278,7 @@ fn it_parses_summary_to_tocitems() {
                                     "format/summary.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -295,6 +305,7 @@ fn it_parses_summary_to_tocitems() {
                                     "format/config.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -321,6 +332,7 @@ fn it_parses_summary_to_tocitems() {
                                     "format/theme/theme.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -340,6 +352,7 @@ fn it_parses_summary_to_tocitems() {
                                                     "format/theme/index-hbs.html"
                                                 ),
                                                 translation_links: None,
+                                                translation_id: None,
                                                 authors: None,
                                                 translators: None,
                                                 description: None,
@@ -367,6 +380,7 @@ fn it_parses_summary_to_tocitems() {
                                                     "format/theme/syntax-highlighting.html"
                                                 ),
                                                 translation_links: None,
+                                                translation_id: None,
                                                 authors: None,
                                                 translators: None,
                                                 description: None,
@@ -404,6 +418,7 @@ fn it_parses_summary_to_tocitems() {
                                     "format/mathjax.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -430,6 +445,7 @@ fn it_parses_summary_to_tocitems() {
                                     "format/rust.html"
                                 ),
                                 translation_links: None,
+                                translation_id: None,
                                 authors: None,
                                 translators: None,
                                 description: None,
@@ -465,6 +481,7 @@ fn it_parses_summary_to_tocitems() {
                     "lib/lib.html"
                 ),
                 translation_links: None,
+                translation_id: None,
                 authors: None,
                 translators: None,
                 description: None,
@@ -491,6 +508,7 @@ fn it_parses_summary_to_tocitems() {
                     "misc/contributors.html"
                 ),
                 translation_links: None,
+                translation_id: None,
                 authors: None,
                 translators: None,
                 description: None,
diff --git a/src/tests/toc_test.rs b/src/tests/toc_test.rs
index 4b64139c..a8fac14b 100644
--- a/src/tests/toc_test.rs
+++ b/src/tests/toc_test.rs
@@ -1,7 +1,8 @@
 #[cfg(test)]
 
 use book::chapter::Chapter;
-use book::toc::TocContent;
+use book::toc::{TocItem, TocContent, flat_toc};
+use parse::summary::parse_level;
 
 #[test]
 fn it_should_produce_the_section_as_string() {
@@ -11,3 +12,68 @@ fn it_should_produce_the_section_as_string() {
     let expected = "1.9.4.".to_string();
     assert_eq!(result, expected);
 }
+
+#[test]
+fn it_flattens_toc() {
+    let text = r#"
+# Summary
+
+[Introduction](misc/introduction.md)
+
+- [mdBook](README.md)
+- [Command Line Tool](cli/cli-tool.md)
+    - [init](cli/init.md)
+    - [build](cli/build.md)
+    - [watch](cli/watch.md)
+    - [serve](cli/serve.md)
+    - [test](cli/test.md)
+- [Format](format/format.md)
+    - [SUMMARY.md](format/summary.md)
+    - [Configuration](format/config.md)
+    - [Theme](format/theme/theme.md)
+        - [index.hbs](format/theme/index-hbs.md)
+        - [Syntax highlighting](format/theme/syntax-highlighting.md)
+    - [MathJax Support](format/mathjax.md)
+    - [Rust code specific features](format/rust.md)
+- [Rust Library](lib/lib.md)
+-----------
+[Contributors](misc/contributors.md)
+"#;
+
+    let toc = parse_level(&mut text.split('\n').collect(), 0, vec![0], true).unwrap();
+
+    let flat = flat_toc(&toc);
+
+    let result: Vec<String> = flat.iter().map(|x| {
+        match *x {
+            TocItem::Numbered(ref i) |
+            TocItem::Unnumbered(ref i) |
+            TocItem::Unlisted(ref i) => i.chapter.title.to_owned(),
+            TocItem::Spacer => "spacer".to_string(),
+        }
+    }).collect::<Vec<String>>();
+
+    let expected = r#"[
+    "Introduction",
+    "mdBook",
+    "Command Line Tool",
+    "init",
+    "build",
+    "watch",
+    "serve",
+    "test",
+    "Format",
+    "SUMMARY.md",
+    "Configuration",
+    "Theme",
+    "index.hbs",
+    "Syntax highlighting",
+    "MathJax Support",
+    "Rust code specific features",
+    "Rust Library",
+    "spacer",
+    "Contributors"
+]"#;
+
+    assert_eq!(format!("{:#?}", result), expected);
+}