Add `si` to list of supported languages (#19723)
Add `si` to list of supported languages (#19723)


wagnerand/addons-server,mozilla/addons-server,mozilla/addons-server,wagnerand/addons-server,wagnerand/addons-server,mozilla/addons-server,mozilla/addons-server,diox/olympia,diox/olympia,diox/olympia,diox/olympia,wagnerand/addons-server