diff --git a/lang/common/sl-SI.json b/lang/common/sl-si.json
similarity index 100%
rename from lang/common/sl-SI.json
rename to lang/common/sl-si.json
diff --git a/lang/form/ar-AA.json b/lang/form/ar-aa.json
similarity index 100%
rename from lang/form/ar-AA.json
rename to lang/form/ar-aa.json
diff --git a/lang/form/sl-SI.json b/lang/form/sl-si.json
similarity index 100%
rename from lang/form/sl-SI.json
rename to lang/form/sl-si.json
diff --git a/lang/pwreset/ar-AA.json b/lang/pwreset/ar-aa.json
similarity index 100%
rename from lang/pwreset/ar-AA.json
rename to lang/pwreset/ar-aa.json
diff --git a/lang/pwreset/sl-SI.json b/lang/pwreset/sl-si.json
similarity index 100%
rename from lang/pwreset/sl-SI.json
rename to lang/pwreset/sl-si.json
diff --git a/lang/setup/sl-SI.json b/lang/setup/sl-si.json
similarity index 100%
rename from lang/setup/sl-SI.json
rename to lang/setup/sl-si.json
diff --git a/lang/telegram/sl-SI.json b/lang/telegram/sl-si.json
similarity index 100%
rename from lang/telegram/sl-SI.json
rename to lang/telegram/sl-si.json