diff --git a/Tools/langtool/Cargo.lock b/Tools/langtool/Cargo.lock
index 362b6ec359..e837567757 100644
--- a/Tools/langtool/Cargo.lock
+++ b/Tools/langtool/Cargo.lock
@@ -1,10 +1,12 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "ansi_term"
-version = "0.11.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
 dependencies = [
  "winapi",
 ]
@@ -28,9 +30,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "clap"
-version = "2.33.3"
+version = "2.34.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
 dependencies = [
  "ansi_term",
  "atty",
@@ -74,9 +76,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.102"
+version = "0.2.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2a5ac8f984bfcf3a823267e5fde638acc3325f6496633a5da6bb6eb2171e103"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
 
 [[package]]
 name = "proc-macro-error"
@@ -104,18 +106,18 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.29"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9f5105d4fdaab20335ca9565e106a5d9b82b6219b5ba735731124ac6711d23d"
+checksum = "dd96a1e8ed2596c337f8eae5f24924ec83f5ad5ab21ea8e455d3566c69fbcaf7"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.9"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+checksum = "3bcdf212e9776fbcb2d23ab029360416bb1706b1aea2d1a5ba002727cbcab804"
 dependencies = [
  "proc-macro2",
 ]
@@ -128,9 +130,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.23"
+version = "0.3.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf9d950ef167e25e0bdb073cf1d68e9ad2795ac826f2f3f59647817cf23c0bfa"
+checksum = "0c6b5c64445ba8094a6ab0c3cd2ad323e07171012d9c98b0b15651daf1787a10"
 dependencies = [
  "clap",
  "lazy_static",
@@ -139,9 +141,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.16"
+version = "0.4.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "134d838a2c9943ac3125cf6df165eda53493451b719f3255b2a26b85f772d0ba"
+checksum = "dcb5ae327f9cc13b68763b5749770cb9e048a99bd9dfdfa58d0cf05d5f64afe0"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -152,13 +154,13 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.76"
+version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6f107db402c2c2055242dbf4d2af0e69197202e9faacbef9571bbe47f5a1b84"
+checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -171,10 +173,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "unicode-segmentation"
-version = "1.8.0"
+name = "unicode-ident"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
+checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c"
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e8820f5d777f6224dc4be3632222971ac30164d4a258d595640799554ebfd99"
 
 [[package]]
 name = "unicode-width"
@@ -182,12 +190,6 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
-[[package]]
-name = "unicode-xid"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
-
 [[package]]
 name = "vec_map"
 version = "0.8.2"
@@ -196,9 +198,9 @@ checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
 [[package]]
 name = "version_check"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "winapi"
diff --git a/Tools/langtool/src/main.rs b/Tools/langtool/src/main.rs
index 0ab1bc29ee..d3ffa95193 100644
--- a/Tools/langtool/src/main.rs
+++ b/Tools/langtool/src/main.rs
@@ -18,6 +18,7 @@ enum Command {
     CopyMissingLines {},
     CommentUnknownLines {},
     RemoveUnknownLines {},
+    MoveKey { old: String, new: String, key: String },
 }
 
 fn copy_missing_lines(reference_ini: &IniFile, target_ini: &mut IniFile) -> io::Result<()> {
@@ -55,6 +56,29 @@ fn deal_with_unknown_lines(
     Ok(())
 }
 
+fn move_key(
+    target_ini: &mut IniFile,
+    old: &str,
+    new: &str,
+    key: &str,
+) -> io::Result<()> {
+    // Insert any missing full sections.
+    if let Some(old_section) = target_ini.get_section_mut(old) {
+        if let Some(line) = old_section.remove_line(key) {
+            if let Some(new_section) = target_ini.get_section_mut(new) {
+                new_section.insert_line_if_missing(&line);
+            } else {
+                println!("No new section {}", new);
+            }
+        } else {
+            println!("No key {} in section {}", key, old);
+        }
+    } else {
+        println!("No old section {}", old);
+    }
+    Ok(())
+}
+
 fn main() {
     let opt = Opt::from_args();
 
@@ -103,6 +127,9 @@ fn main() {
             Command::RemoveUnknownLines {} => {
                 deal_with_unknown_lines(&reference_ini, &mut target_ini, true).unwrap();
             }
+            Command::MoveKey { ref old, ref new,ref key,  } => {
+                move_key(&mut target_ini,  &old, &new, &key).unwrap();
+            }
         }
 
         target_ini.write().unwrap();
diff --git a/Tools/langtool/src/section.rs b/Tools/langtool/src/section.rs
index 1812cd006e..dbb097832a 100644
--- a/Tools/langtool/src/section.rs
+++ b/Tools/langtool/src/section.rs
@@ -11,6 +11,28 @@ pub struct Section {
 }
 
 impl Section {
+    pub fn remove_line(&mut self, key: &str) -> Option<String> {
+        let mut remove_index = None;
+        for (index, line) in self.lines.iter().enumerate() {
+            let prefix = if let Some(pos) = line.find(" =") {
+                &line[0..pos]
+            } else {
+                continue;
+            };
+
+            if prefix.eq_ignore_ascii_case(&key) {
+                remove_index = Some(index);
+                break;
+            }
+        }
+
+        if let Some(remove_index) = remove_index {
+            Some(self.lines.remove(remove_index))
+        } else {
+            None
+        }
+    }
+
     pub fn insert_line_if_missing(&mut self, line: &str) -> bool {
         let prefix = if let Some(pos) = line.find(" =") {
             &line[0..pos + 2]