For ChromeOS, macOS, Windows, iOS and Android:

As of release 4.4, Spectral Analysis has been localized for:
– Catalan
– Czech
– Danish
– German
– Greek
– English
– Spanish
– Estonian
– Finnish
– French
– Indonesian
– Italian
– Japanese
– Korean
– Lithuanian
– Latvian
– Norwegian
– Dutch
– Polish
– Portuguese
– Romanian
– Russian
– Slovakian
– Slovenian
– Swedish
– Thai
– Turkish
– Ukrainian
– Chinese – Simplified
– Chinese – Traditional

Spectral Analysis runs in the language of the operating system if available. There is no switch to select the displayed language. For example, if run on a Windows 10 machine with Windows running in French, Spectral Analysis will display in French. If the operating system language is not available in Spectral Analysis, Spectral Analysis will display in English.

The installer for macOS and Windows is in English only.