I've managed to ignore MCP servers for a long time as well, but recently I found myself creating one to help the LLM agents with my local language (Papiamentu) in the dialect I want.

I made a prolog program that knows the valid words and spelling along with sentence conposition rules.

Via the MCP server a translated text can be verified. If its not faultless the agent enters a feedback loop until it is.

The nice thing is that it's implemented once and I can use it in opencode and claude without having to explain how to run the prolog program, etc.