# Sentence helper: licences The sentence helper in AuraSense AAC (aac-web) downloads one language model, on request, and runs it on the person's device. Nothing they type is sent anywhere. ## Gemma 4 E2B - Gemma 4 E2B by Google DeepMind, in Google AI Edge's web build for LiteRT-LM (litert-community on Hugging Face). - Licence: Apache-2.0 (https://ai.google.dev/gemma/docs/gemma_4_license); the text is `licences/Apache-2.0.c71d239df917.txt`. - Source: https://huggingface.co/litert-community/gemma-4-E2B-it-litert-lm/blob/b3ca0d2f076785a8f4b2219ddbd2bdb99954eae1/gemma-4-E2B-it-web.litertlm (2008432640 bytes, SHA-256 `3a08e8d94e23b814ae5414469c370c503813949acb8ceaa17e4ebf8a35af35b5`), unchanged, published here in 30 parts of at most 64 MiB, each named by its own SHA-256. Together they are the file. - Size: 2.0 GB. Ready in: Arabic (ar), Danish (da), German (de), English (en), Spanish (es), Persian (fa), French (fr), Hindi (hi), Indonesian (id), Korean (ko), Malay (ms), Portuguese (pt), Russian (ru), Swedish (sv), Turkish (tr), Urdu (ur), Vietnamese (vi). ## Gemma 4 E4B - Gemma 4 E4B by Google DeepMind, in Google AI Edge's web build for LiteRT-LM (litert-community on Hugging Face). - Licence: Apache-2.0 (https://ai.google.dev/gemma/docs/gemma_4_license); the text is `licences/Apache-2.0.c71d239df917.txt`. - Source: https://huggingface.co/litert-community/gemma-4-E4B-it-litert-lm/blob/2eee7ac325f20eb8c9ac1d0e972f7c84663062da/gemma-4-E4B-it-web.litertlm (2969059328 bytes, SHA-256 `3904d826d5dddd25ea173e85204caec09e68ba038116e9b992b69cbdc94f57a0`), unchanged, published here in 45 parts of at most 64 MiB, each named by its own SHA-256. Together they are the file. - Size: 3.0 GB. Ready in: Gujarati (gu), Hebrew (he), Italian (it), Japanese (ja), Marathi (mr), Norwegian (nb), Dutch (nl), Punjabi (pa), Polish (pl), Telugu (te), Thai (th), Filipino (tl), Ukrainian (uk), Chinese (zh). The runtime that runs it (LiteRT-LM, Apache-2.0) is vendored with its own licence and notice under `vendor/litert-lm--/`.