Read and show Numeric answers in the exercise language

[rtibblesbot]

Summary

• Numeric answers are read in the exercise language's separators, grouping and digits (fallback: channel language, then UI language)
• Stored as xsd:double; shown in that language without grouping
• The invalid-number message gives its examples in that language

References

Fixes #6198. Headless mismatch: #6150. Vendored from: kolibri numeralNormalization.js

Reviewer guidance

QTI editor mounted with language set:

State	Before	After
fr, stored 1234.5 and 30
ar-EG, same item
fr, typing 1,5 (stores 1.5)

State	Screenshot
fr, invalid 1,2,3

axe: one color-contrast violation on "Add acceptable answer", same on unstable.

Open questions:

• In a comma-decimal language, . falls back to xsd:double (French 1.5 stores 1.5) unless the language groups with .; German 1.5 is rejected inline but stored raw, so headless validation passes it.
• Grouping ignores Intl's minimum grouping digits, so Spanish 1.234 reads as 1234.

On a language change, unedited answers save as stored, even if the new language reads them differently (German 1,2).

QA steps

Setup: in a channel, add an exercise with Language (under Audience on Details) set to Français (fr) and two Numeric questions: Q1 with 1,5, 1234,5, -3,25; Q2 with 12000,5, 0,75.

1. On the exercise's Questions tab, tick Show answers and open Q1, then set Language on Details to English (en) and open Questions: open Q1 reads 1.5, 1234.5, -3.25 and closed Q2 12000.5, 0.75 where French showed 1,5 … 0,75, with no validation message. Open Q2, Add acceptable answer 1,2, set Language to Deutsch (de) on Details and open Questions: Q2 shows 1,2 as typed with "Must be a valid number (e.g. 12; 0,5; -3,14)", the other answers in comma form.

Evidence

Change the exercise language with stored Numeric answers

Step	Screenshot
French: open Q1 reads 1,5, 1234,5, -3,25
English: Q1 still open, reads 1.5, 1234.5, -3.25; Q2 12000.5, 0.75; no errors
German, both closed: 1,5, 1234,5, -3,25; 12000,5, 0,75
English: 1,2 typed in Q2, flagged with English examples, Q2 Incomplete
After the fix, German: 1,2 kept as typed, flagged with German examples

s5-language-switch-flow.webm

More captures (3)

Step	Screenshot
French, both closed, Show answers ticked: Q1 1,5, 1234,5, -3,25
German: Q2 open, 0,75 changed to 1.234,8
English: Q2 open, reads 12000.5, 1234.8

AI usage

Claude Code planned and implemented the change from the issue's rules. Verified with the QTIEditor and channelEdit Jest suites, pre-commit, and screenshots of the editor in a headless browser.

🤖 Generated with Claude Code

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@rtibblesbot's comments are generated by an LLM, and should be evaluated accordingly

How was this generated?

• Ran pre-flight CI checks (lint, format, tests) and verified all pass
• Rebased onto the target branch and resolved any conflicts
• Reorganized commit history into clean, logical commits
• Audited the diff to ensure only issue-relevant files are changed
• Built PR body from the repository's PR template with evidence blocks

🟡 Waiting for feedback Last updated: 2026-10-03 04:34 UTC