diff --git a/lang/common/fa-IR.json b/lang/common/fa-ir.json
similarity index 100%
rename from lang/common/fa-IR.json
rename to lang/common/fa-ir.json
diff --git a/lang/form/fa-IR.json b/lang/form/fa-ir.json
similarity index 100%
rename from lang/form/fa-IR.json
rename to lang/form/fa-ir.json
diff --git a/lang/pwreset/fa-IR.json b/lang/pwreset/fa-ir.json
similarity index 100%
rename from lang/pwreset/fa-IR.json
rename to lang/pwreset/fa-ir.json
diff --git a/lang/pwreset/nl-NL.json b/lang/pwreset/nl-nl.json
similarity index 100%
rename from lang/pwreset/nl-NL.json
rename to lang/pwreset/nl-nl.json
diff --git a/lang/telegram/es-ES.json b/lang/telegram/es-es.json
similarity index 100%
rename from lang/telegram/es-ES.json
rename to lang/telegram/es-es.json
diff --git a/lang/telegram/fa-IR.json b/lang/telegram/fa-ir.json
similarity index 100%
rename from lang/telegram/fa-IR.json
rename to lang/telegram/fa-ir.json