WavePad does not typically use an "exclusive" language lock for general consumers; it is designed to be multilingual. However, the language you see depends entirely on the version of the installer you used. If you cannot find your desired language in the menu, the solution is to uninstall your current version and download the standard version directly from the official developer site.
If running the installer does not change the language, your browser cache may be forcing a download of the old setup file. wavepad change language exclusive
NCH Software sometimes distributes specific installers for certain regions (for example, a distinct installer for the Japanese or Chinese markets). If you downloaded the software from a regional third-party site, the "exclusive" version you installed might not have the English language pack bundled with it by default. WavePad does not typically use an "exclusive" language
Below is an article covering the "exclusive" method for changing your WavePad interface language. If running the installer does not change the