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diff --git a/lang.csh b/lang.csh
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index 94c4625..4e5f014 100644
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--- a/lang.csh
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+++ b/lang.csh
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@@ -13,7 +13,7 @@ foreach config (/etc/locale.conf "${HOME}/.i18n")
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 end
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 if (${?LANG_backup}) then
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-    set LANG="${LANG_backup}"
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+    setenv LANG "${LANG_backup}"
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 endif
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 unset LANG_backup config