fun writeLangStream(stream: OutputStream, originalMsgIds: List<MsgId>, translations: Map<MsgId, MsgStr>, isOriginLanguage: Boolean = false): Unit
Write a *.lang file to an OutputStream.
stream - the stream to write to
originalMsgIds - a list of the translatable strings in the base language
translations - a map from the strings in the base language to the translated strings
isOriginLanguage - true if the *.lang file is for the base language, false for all other languages