Use each instrument's language for negation instead of always English (#142)

[roshaneyshah]

Description

process_questions hardcoded negate(question_text, 'en'), so the pt, es, it, fr and de rules in negator.py never ran during matching. This maps each question text to its instrument's language field and passes it through, defaulting to "en". No language detection is run, so nothing is detected repeatedly on the same text.

Only matcher.py is changed, plus one new test file. No new dependencies.

Urdu negation rules will follow in a separate PR.

Fixes #142

Type of change

• Bug fix (non-breaking change which fixes an issue)

Testing

Added tests/test_negation_language.py: checks that a Portuguese item is negated with Portuguese rules, and that the default stays English.

Ran locally: test_negation_language.py, test_negator.py, test_match_negative_polarity.py, 16 passed.

I have not yet run the Harmony API tests.

Test Configuration

• Library version: 1.0.7
• OS: Windows 11
• Toolchain: Python 3.11, pytest 9.1.1

Checklist

• My PR is for one issue, rather than for multiple unrelated fixes.
• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings
• I add third party dependencies only when necessary.

[woodthom2]

Thanks so much!

Feel free to submit a PR with Urdu rules