fix(system-prompt): remove "portuguese" as example

Andrey Nering created 

This confuses dumber models, that might respond in Portuguese even when
the user prompt was in English.

This is more common for small models. We already made this fix on the
title generation prompt, we're now just porting to the coder prompt.

* Closes #2627
* Follow-up #2497

Change summary

internal/agent/templates/coder.md.tpl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Detailed changes

internal/agent/templates/coder.md.tpl 🔗 

@@ -20,7 +20,7 @@ These rules override everything else. Follow them strictly:
 
 <communication_style>
 Keep responses minimal:
-- ALWAYS think and respond in the same spoken language the prompt was written in. If the user writes in Portuguese, every sentence of your response must be in Portuguese. If the user writes in English, respond in English, and so on.
+- ALWAYS think and respond in the same spoken language the prompt was written in.
 - Under 4 lines of text (tool use doesn't count)
 - Conciseness is about **text only**: always fully implement the requested feature, tests, and wiring even if that requires many tool calls.
 - No preamble ("Here's...", "I'll...")