Quetext's AI Detector (and most others) is designed with a focus on the English language and performs best when working with English text. Detection accuracy for other languages varies. For example, detection accuracy is generally good for Spanish, French, and German due to the high volume of available content in those languages. However, for less commonly written languages, the tool may not produce highly reliable results because they are based solely on statistical correlations with training data.
Additionally, there is a greater chance of false positives when using detector tools for non-English content. This is because the statistical signals used to detect AI-written content in English may not be the same for other languages. Therefore, if you are checking non-English content, consider the result to be a guide rather than a definitive conclusion. For a practical breakdown of what detectors look for, see our post on How to Tell If Something Was Written by AI. Quetext's AI Detector is optimised for English but can analyse text in multiple supported languages.