Mixed-language Alert Call prompts outside en / en_GB

[kierknoby]

Mixed-language Alert Call prompts outside en / en_GB

Repeat Caller Alert Calls can produce mixed-language audio when the FreePBX/Asterisk system language is set to a language other than en or en_GB.

Observed behaviour

Tested on FreePBX 17 / Asterisk 22 with the global Sound Languages setting changed to French.

Standard FreePBX/Asterisk prompts correctly follow the configured French language, confirming that the French sound pack and global language selection are working. However, parts of the Repeat Caller Alert Call remain in English. For example, the word "Number" is spoken in English while the surrounding call audio is in French.

We also found issues when testing in Spanish and German, and likely most others. This results in a mixed-language Alert Call.

Expected behaviour

All Repeat Caller Alert Call audio should respect the active Asterisk channel language.

Where standard Asterisk sound prompts or language-aware AGI commands are available, Repeat Caller should use those rather than supplying English-specific prompts.

The behaviour should work for any installed Asterisk sound language, not just en and en_GB.

Investigation required

Review the complete Alert Call audio path for:

• hard-coded English text or sound files;
• explicit English prompt names or paths;
• channel language being overridden or lost during originate/AGI handling;
• uses of STREAM FILE, SAY NUMBER, SAY DIGITS or related AGI commands that may not be respecting the active channel language;
• any existing special handling for en / en_GB that does not generalise to other languages.

The fix should avoid maintaining Repeat Caller-specific translations where equivalent standard Asterisk prompts already exist.

Testing

Add coverage confirming that:

• Alert Calls preserve and respect a non-English channel language;
• standard prompts are resolved using that language;
• spoken numbers use the appropriate Asterisk language handling;
• no Repeat Caller-owned English prompt is inserted into an otherwise non-English Alert Call;
• existing en and en_GB behaviour remains unchanged.

[kierknoby]

I am still working on this. The fix is more involved than first expected because Alert Call audio is assembled from standard Asterisk/FreePBX sound prompts, and equivalent filenames/phrasing differ between languages.

French mostly maps cleanly to the existing standard sound set, but none of the non-English sequences have been fully live-tested yet. Spanish and German require closer inspection of the actual prompts so the generated message remains coherent and does not fall back word-by-word into English.

The aim is to keep this entirely within the existing sound packs, with no custom recordings. Where a complete native sequence cannot be constructed cleanly, the generated Alert Call will fall back to English as a whole rather than producing mixed-language audio.

It is taking longer because the actual sound files need checking rather than assuming similarly named prompts say the same thing in each language.

[kierknoby]

The implementation is now in PR review.

Alert Call language handling has been updated to validate the actual required sound prompts rather than relying on language pack availability alone. The generated Alert Call sequence is now checked against the prompts that Repeat Caller can actually use.

The implementation now distinguishes between:

• Native and Original
• Native but Adapted
• Rejected → Fallback
• Untested → Fallback

Where a complete and coherent native sequence cannot be constructed, the Alert Call falls back to English as a whole rather than mixing languages between individual prompts.

French has been verified as an adapted prompt mapping using the existing sound pack. Other languages have been evaluated based on prompt coverage, with fallback used where the required sequence cannot currently be generated reliably.

No custom recordings have been introduced. The implementation continues to use the existing Asterisk/FreePBX sound infrastructure.

The PR also includes additional contract coverage for language detection, fallback handling, and supported audio formats.