CHANGELOG.md in translate_self-0.8.0 vs CHANGELOG.md in translate_self-0.9.0

@@ -32,6 +32,11 @@
 
 - Get rid of duplicated code. Update `benchmark.rb`.
 
 ## [0.8.0] - 2021-06-08
 
-- Add option to use the shorter `t_to_language_code` alias. 
+- Add option to use the shorter `t_to_language_code` alias. 
+
+## [0.9.0] - 2021-06-08
+
+# Breaking change from 0.8!
+- `t_to_language_code` was too much typing, so changed it to `to_language_code`. 
\ No newline at end of file