TrelloExport 1.9.77 improves the injector (the component that injects TrelloExport link in the print menu) by handling more languages.
Due to the recent Trello UI changes it is now not to simple to find the right place in UI to add the button, and the injector was modified to match the print menu button text.
If you don't see the TrelloExport button appearing please open an issue at GitHub specifying your language, and possibly share a screenshot so to allow me to add missing languages.
Your feedback is always welcome. If you have any problem please open an issue on GitHub, I'll do my best to fix it quickly.
If you wish to support the development of this tool, like Richard did (thanks again!), you can make a donation.
You can now get TrelloExport from the Chrome Web Store at this URL.
If you want the source version, get them on GitHub at https://github.com/trapias/trelloExport, and follow the installation instructions in the readme.