diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13cb2f0..759d546 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## v0.4.1
+- Add a translation system using the `locales` folder and `messages.json`
+- Add more trace logging
+- Config files are now parsed as JSON5 = comments are allowed
+
 ## v0.3.0
 - Changed config/storage format to directory-based, removed shared config mutex
 - Made more options configurable (timeouts, catch-up limits, etc)
diff --git a/Cargo.lock b/Cargo.lock
index 8e8767c..8c00e14 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -335,6 +335,7 @@ dependencies = [
  "elefren",
  "env_logger",
  "futures 0.3.16",
+ "json5",
  "log 0.4.14",
  "native-tls",
  "once_cell",
@@ -764,6 +765,17 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "json5"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96b0db21af676c1ce64250b5f40f3ce2cf27e4e47cb91ed91eb6fe9350b430c1"
+dependencies = [
+ "pest",
+ "pest_derive",
+ "serde",
+]
+
 [[package]]
 name = "kernel32-sys"
 version = "0.2.2"
@@ -829,6 +841,12 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "maplit"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
+
 [[package]]
 name = "matches"
 version = "0.1.8"
@@ -1105,6 +1123,49 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
+[[package]]
+name = "pest"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10f4872ae94d7b90ae48754df22fd42ad52ce740b8f370b03da4835417403e53"
+dependencies = [
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "833d1ae558dc601e9a60366421196a8d94bc0ac980476d0b67e1d0988d72b2d0"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99b8db626e31e5b81787b9783425769681b347011cc59471e33ea46d2ea0cf55"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54be6e404f5317079812fc8f9f5279de376d8856929e21c184ecf6bbd692a11d"
+dependencies = [
+ "maplit",
+ "pest",
+ "sha-1 0.8.2",
+]
+
 [[package]]
 name = "phf"
 version = "0.7.24"
@@ -2110,6 +2171,12 @@ version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
 
+[[package]]
+name = "ucd-trie"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
+
 [[package]]
 name = "unicase"
 version = "1.4.2"
diff --git a/Cargo.toml b/Cargo.toml
index 33aeffb..22774c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,7 @@ futures = "0.3"
 voca_rs = "1.13.0"
 regex = "1.5.4"
 once_cell = "1.8.0"
+json5 = "0.4.1"
 
 native-tls = "0.2.8"
 websocket = "0.26.2"
diff --git a/README.md b/README.md
index 915ff64..f6d78fc 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ In case you need to re-authenticate an existing group, do the same but use `-A`
 
 ### Editing config
 
-**JSON does not support comments! Remove comments before using examples copied from this guide!**
+**Staring v0.4.1, the config files support comments!**
 
 A typical setup could look like this:
 
@@ -152,7 +152,7 @@ Note that changing config externally requires a restart. It's better to use slas
 
 When adding hashtags, *they must be entered as lowercase* and without the `#` symbol!
 
-The file formats are quite self-explanatory (again, remove comments before copying, JSON does not support comments!)
+The file formats are quite self-explanatory:
 
 **config.json**
 
diff --git a/src/error.rs b/src/error.rs
index dd3cb2b..b103740 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -19,6 +19,8 @@ pub enum GroupError {
     #[error(transparent)]
     Serializer(#[from] serde_json::Error),
     #[error(transparent)]
+    Serializer5(#[from] json5::Error),
+    #[error(transparent)]
     Elefren(#[from] elefren::Error),
 }
 
diff --git a/src/store/group_config.rs b/src/store/group_config.rs
index 5eddbea..838b925 100644
--- a/src/store/group_config.rs
+++ b/src/store/group_config.rs
@@ -163,7 +163,7 @@ async fn load_or_create_control_file(control_path: impl AsRef<Path>) -> Result<M
     let mut dirty = false;
     let mut control: MutableConfig = if control_path.is_file() {
         let f = tokio::fs::read(&control_path).await?;
-        let mut control: MutableConfig = serde_json::from_slice(&f)?;
+        let mut control: MutableConfig = json5::from_str(&String::from_utf8_lossy(&f))?;
         control._path = control_path.to_owned();
         control
     } else {
@@ -185,7 +185,7 @@ async fn load_or_create_state_file(state_path: impl AsRef<Path>) -> Result<State
     let mut dirty = false;
     let mut state: StateConfig = if state_path.is_file() {
         let f = tokio::fs::read(&state_path).await?;
-        let mut control: StateConfig = serde_json::from_slice(&f)?;
+        let mut control: StateConfig = json5::from_str(&String::from_utf8_lossy(&f))?;
         control._path = state_path.to_owned();
         control
     } else {
@@ -206,7 +206,7 @@ async fn load_locale_override_file(locale_path: impl AsRef<Path>) -> Result<Opti
     let locale_path = locale_path.as_ref();
     if locale_path.is_file() {
         let f = tokio::fs::read(&locale_path).await?;
-        let opt : TranslationTable = serde_json::from_slice(&f)?;
+        let opt : TranslationTable = json5::from_str(&String::from_utf8_lossy(&f))?;
         Ok(Some(opt))
     } else {
         Ok(None)
@@ -275,7 +275,7 @@ impl GroupConfig {
         let mut dirty = false;
         let mut config: FixedConfig = if config_path.is_file() {
             let f = tokio::fs::read(&config_path).await?;
-            let mut config: FixedConfig = serde_json::from_slice(&f)?;
+            let mut config: FixedConfig = json5::from_str(&String::from_utf8_lossy(&f))?;
             config._path = config_path;
             if config.appdata != appdata {
                 config.appdata = appdata;
@@ -321,7 +321,7 @@ impl GroupConfig {
 
         /* config */
         let f = tokio::fs::read(&config_path).await?;
-        let mut config: FixedConfig = serde_json::from_slice(&f)?;
+        let mut config: FixedConfig = json5::from_str(&String::from_utf8_lossy(&f))?;
         config._path = config_path;
 
         /* control */
diff --git a/src/store/mod.rs b/src/store/mod.rs
index 50de2d0..041606c 100644
--- a/src/store/mod.rs
+++ b/src/store/mod.rs
@@ -71,7 +71,7 @@ impl ConfigStore {
         let config: CommonConfig = if let Some(cf) = &common_file {
             debug!("Loading common config from {}", cf.display());
             let f = tokio::fs::read(&cf).await?;
-            serde_json::from_slice(&f)?
+            json5::from_str(&String::from_utf8_lossy(&f))?
         } else {
             debug!("No common config file, using defaults");
             CommonConfig::default()
@@ -225,7 +225,7 @@ impl ConfigStore {
     }
 
     fn load_locale(&mut self, locale_name: &str, locale_json: &str, is_default: bool) {
-        if let Ok(mut tr) = serde_json::from_str::<TranslationTable>(locale_json) {
+        if let Ok(mut tr) = json5::from_str::<TranslationTable>(locale_json) {
             debug!("Loaded locale: {}", locale_name);
 
             if !is_default {