Update derive_lang_from_path to derive from any part of path

[george-gca]

🔤 Polyglot PR

Currently derive_lang_from_path only considers small parts of the path. This changes to consider any part in any/part/of/the/path.txt. This allows, for example, creating files like assets/data/en-us/cards.json and assets/data/pt-br/cards.json and setting its permalink to /assets/data/cards.json.

I need help setting tests for this, I have no idea where to start.

Type of change

• Docs update (changes to the readme or a site page, no code changes)
• Ops wrangling (automation or test improvements)
• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Sweet release (needs a lot of work and effort)
• Something else (explain please)

Checklists

• If modifying code, at least one test has been added to the suite

[george-gca]

Now just missing the testing part.