Downloading French 23 1.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The program is categorized as Education Tools. We recommend checking the downloaded files with any free antivirus. This free Mac application was originally produced by Strelka Limited.
From the developer:
French 23 is a simple and convenient multilingual dictionary of the French language. The dictionary includes Chinese (ZH), Danish (DA), Dutch (NL), English (EN), Finnish (FI), French (FR), German (DE), Greek (EL), Indonesian (ID), Italian (IT), Japanese (JA), Korean (KO), Malay (MS), Norwegian Bokmål (NB), Russian (RU), Portuguese (PT), Spanish (ES), Swedish (SV), Thai (TH), Turkish (TR), and Vietnamese (VI).
You may want to check out more software for Mac, such as Chinese 23, WordPower Learn French Vocabulary by InnovativeLanguage.com or Learn French - Absolute Beginner Lessons 1 to 25 with Audio, which might be related to French 23.