Enter the unsung hero of the productivity world:
The client replies: "Every word has a blue squiggly line under it. Why are you flagging all my company's product names as typos?" office language pack 2016
You send it.
You have Microsoft 365 (just download the free Language Accessory Packs from the web) or you only need to read documents (Google Translate is fine for that). Enter the unsung hero of the productivity world: