diff --git a/.tx/config b/.tx/config
index 339e80b4..f7363d04 100644
--- a/.tx/config
+++ b/.tx/config
@@ -1,6 +1,6 @@
 [main]
 host = https://www.transifex.com
-lang_map = pt_BR: pt-br, zh_CN: zh-cn, zh_HK: zh-hk, zh_TW: zh-tw, nl_BE: nl-be, sv_SE: sv-se
+lang_map = pt_BR: pt-br, zh_CN: zh-cn, zh_HK: zh-hk, zh_TW: zh-tw, nl_BE: nl-be, sv_SE: sv-se, cz-CS: cz_cs
 
 [file-browser.file-browser]
 file_filter = frontend/src/i18n/<lang>.json