I was helping someone out with there spark client - changing the language back to english from dutch. He explained to me it was still stuck in dutch. I attempted to take the steps I recommended to him and Spark is still stuck in Dutch. This is annoying that something this simple cannot be completed. Unfortunately, we use spark to offer support for Mozilla at chat-support.mozilla.com, So we cannot change clients. This is extremely annoying and if I could would stop using spark because of this one small issue. If anyone knows how to change this option or if it’s a known issue, please let me know.