diff --git a/eclass/mozlinguas-v2.eclass b/eclass/mozlinguas-v2.eclass
index 215141cb44c74..726c6705a87c6 100644
--- a/eclass/mozlinguas-v2.eclass
+++ b/eclass/mozlinguas-v2.eclass
@@ -60,6 +60,12 @@ esac
 # The http URI prefix for the release tarballs and language packs.
 : ${MOZ_HTTP_URI:=""}
 
+# @ECLASS-VARIABLE: MOZ_LANGPACK_HTTP_URI
+# @ÐESCRIPTION:
+# An alternative http URI if it differs from official mozilla URI.
+# Defaults to whatever MOZ_HTTP_URI was set to.
+: ${MOZ_LANGPACK_HTTP_URI:=${MOZ_HTTP_URI}}
+
 # @ECLASS-VARIABLE: MOZ_LANGPACK_PREFIX
 # @DESCRIPTION:
 # The relative path till the lang code in the langpack file URI.
@@ -129,7 +135,7 @@ MOZ_TOO_REGIONALIZED_FOR_L10N=( fy-NL ga-IE gu-IN hi-IN hy-AM nb-NO nn-NO pa-IN
 # No language packs for alphas and betas
 if ! [[ -n ${MOZ_GENERATE_LANGPACKS} ]] ; then
 	if ! [[ ${PV} =~ alpha|beta ]] || { [[ ${PN} == seamonkey ]] && ! [[ ${PV} =~ alpha ]] ; } || [[ -n ${MOZ_FORCE_UPSTREAM_L10N} ]] ; then
-	[[ -z ${MOZ_FTP_URI} ]] && [[ -z ${MOZ_HTTP_URI} ]] && die "No URI set to download langpacks, please set one of MOZ_{FTP,HTTP}_URI"
+	[[ -z ${MOZ_FTP_URI} ]] && [[ -z ${MOZ_LANGPACK_HTTP_URI} ]] && die "No URI set to download langpacks, please set one of MOZ_{FTP,HTTP_LANGPACK}_URI"
 	for x in "${MOZ_LANGS[@]}" ; do
 		# en and en_US are handled internally
 		if [[ ${x} == en ]] || [[ ${x} == en-US ]]; then
@@ -144,8 +150,8 @@ if ! [[ -n ${MOZ_GENERATE_LANGPACKS} ]] ; then
 		SRC_URI+=" l10n_${xflag/[_@]/-}? ("
 		[[ -n ${MOZ_FTP_URI} ]] && SRC_URI+="
 			${MOZ_FTP_URI}/${MOZ_LANGPACK_PREFIX}${x}${MOZ_LANGPACK_SUFFIX} -> ${MOZ_P}-${x}${MOZ_LANGPACK_UNOFFICIAL:+.unofficial}.xpi"
-		[[ -n ${MOZ_HTTP_URI} ]] && SRC_URI+="
-			${MOZ_HTTP_URI}/${MOZ_LANGPACK_PREFIX}${x}${MOZ_LANGPACK_SUFFIX} -> ${MOZ_P}-${x}${MOZ_LANGPACK_UNOFFICIAL:+.unofficial}.xpi"
+		[[ -n ${MOZ_LANGPACK_HTTP_URI} ]] && SRC_URI+="
+			${MOZ_LANGPACK_HTTP_URI}/${MOZ_LANGPACK_PREFIX}${x}${MOZ_LANGPACK_SUFFIX} -> ${MOZ_P}-${x}${MOZ_LANGPACK_UNOFFICIAL:+.unofficial}.xpi"
 		SRC_URI+=" )"
 		IUSE+=" l10n_${xflag/[_@]/-}"
 		# We used to do some magic if specific/generic locales were missing, but