ChatGPT Cites 29% Fewer Sources in Portuguese Than in English

A ChatGPT answer in Portuguese cites 1.94 websites on average, 29.2% fewer than the 2.74 in a US English answer, and every other language tested also gets fewer sources. ChatGPT gives no sources at all in 8% of Portuguese answers, against 1.7% in US English.

ChatGPT answers with no sources by language or market

English (US)

1.7%

English (UK)

1.6%

English (Canada)

1.8%

English (Australia)

1.6%

Spanish

6.8%

French

5.2%

Italian

5.7%

German

6.9%

Portuguese

Source: Suff Digital analysis of 14,000 ChatGPT and Gemini answers in six languages · ChatGPT and Gemini, September 2026

Gemini answers with no sources by language or market

English (US)

38.8%

English (UK)

34.8%

Spanish

38.5%

Italian

37%

Portuguese

41.5%

French

48.9%

German

52.2%

Source: Suff Digital analysis of 14,000 ChatGPT and Gemini answers in six languages · ChatGPT and Gemini, September 2026

Source: ChatGPT Cites 29% Fewer Sources in Portuguese Than in English - Suff Digital