Refactor translation keys

[lfdebrux]

What problem does this pull request solve?

I have been looking at the translations files and have noticed that we are inconsistent in how we name the variable for the number of a question… this PR makes the keys consistent for question_number, question_text, and route_number.

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[thomasiles]

This is amazing, really appreciate the care you've taken over the names 🏅

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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