I've just looked up Wiktionary in Kiwix and it's available to download for offline use too. Just under 8GB.

Agree and yes! I happily pay around 100€ annually. Comes with quite a few good perks

• unlimited access to probably one of the best search engines (for search-engine-literate folk it's not necessarily that you'll magically find better websites, but the quantity of garbage-/AI-websites will just be heavily reduced and you won't have the problem that the first three or so links will be ads/sponsorships; it makes searching just feel nicer)
• customisable search (for example, I can generally rank search results for pinterest lower or outright block them to not even have them show up in the first place and instead boost results from beehaw)
• customisable and privacy-respecting AI bots only if you want to use them (from what I could find out, the AI bots always start every new conversation with a blank slate of you, no matter how much you've used Kagi or the LLMs before)
• Kagi Small Web, which is an initiative to basically push the "alive internet theory" by highlighting small blogs and personal websites of a whole range of people
• Kagi Universal Summariser, which is an AI summariser that works very well on just about any text you give it and, for the articles and papers I threw at it, doesn't tend to hallucinate stuff

It's ok ...

Beware it's not foss

I use translator app its offline foss app on fdroid