diff --git a/lang/admin/zh-Hans.json b/lang/admin/zh-hans.json
similarity index 100%
rename from lang/admin/zh-Hans.json
rename to lang/admin/zh-hans.json
diff --git a/lang/common/zh-Hans.json b/lang/common/zh-hans.json
similarity index 100%
rename from lang/common/zh-Hans.json
rename to lang/common/zh-hans.json
diff --git a/lang/email/zh-Hans.json b/lang/email/zh-hans.json
similarity index 100%
rename from lang/email/zh-Hans.json
rename to lang/email/zh-hans.json
diff --git a/lang/form/zh-Hans.json b/lang/form/zh-hans.json
similarity index 100%
rename from lang/form/zh-Hans.json
rename to lang/form/zh-hans.json
diff --git a/lang/pwreset/zh-Hans.json b/lang/pwreset/zh-hans.json
similarity index 100%
rename from lang/pwreset/zh-Hans.json
rename to lang/pwreset/zh-hans.json
diff --git a/lang/setup/zh-Hans.json b/lang/setup/zh-hans.json
similarity index 100%
rename from lang/setup/zh-Hans.json
rename to lang/setup/zh-hans.json
diff --git a/lang/telegram/zh-Hans.json b/lang/telegram/zh-hans.json
similarity index 100%
rename from lang/telegram/zh-Hans.json
rename to lang/telegram/zh-hans.json