Allow to config different language in commit message

[elct9620]

Issue

I find that v0.83.0+ will use the user's language to generate the commit message

aider/aider/prompts.py

Lines 16 to 19 in 3caab85

	Ensure the commit message:{language_instruction}
	- Starts with the appropriate prefix.
	- Is in the imperative mood (e.g., \"add feature\" not \"added feature\" or \"adding feature\").
	- Does not exceed 72 characters.

Is it possible to add a config to set commit-language: en to avoid it?

The reason is that a global team may want to use English commit for review, but the developer can use their native language to review the agent's work.

The team member will hard to understand the commit if the commit message isn't their native language.

Version and model info

Aider v0.83.1
Main model: anthropic/claude-3-7-sonnet-20250219 with diff edit format, infinite output
Weak model: anthropic/claude-3-5-haiku-20241022