Add french, italian, portuguese, spanish, german (#155)

The french 6 layers variant wasn't included because it's not good enough
yet. Use the `french_24l` variant for now.

docs/CLI Commands/generate.md

@@ -19,10 +19,11 @@ This will generate a WAV file `./tts_output.wav` with the default text and voice
 - `--text TEXT`: Text to generate (default: "Hello world! I am Kyutai Pocket TTS. I'm fast enough to run on small CPUs. I hope you'll like me.")
 - `--voice VOICE`: Path to audio conditioning file (voice to clone) (default: "hf://kyutai/tts-voices/alba-mackenna/casual.wav"). Urls and local paths are supported.
 - `--output-path OUTPUT_PATH`: Output path for generated audio (default: "./tts_output.wav")
+- `--language LANGUAGE`: Language for the TTS model, one of `'english_2026-01'`, `'english_2026-04'`, `'english'`, `'french_24l'`, `'german_24l'`, `'portuguese_24l'`, `'italian_24l'`, `'spanish_24l'` (default: `english`, which is the same model as `'english_2026-04'`). Incompatible with `--config`. The "24l" variants are bigger models, not distilled yet and here only as preview.
 
 ### Generation Parameters
 
-- `--config CONFIG_PATH`: Path to custom config.yaml (for loading local model files) or model signature (default: "b6369a24")
+- `--config CONFIG_PATH`: Path to custom config.yaml (for loading local model files). Incompatible with `--language`.
 - `--lsd-decode-steps LSD_DECODE_STEPS`: Number of generation steps (default: 1)
 - `--temperature TEMPERATURE`: Temperature for generation (default: 0.7)
 - `--noise-clamp NOISE_CLAMP`: Noise clamp value (default: None)
@@ -32,6 +33,7 @@ This will generate a WAV file `./tts_output.wav` with the default text and voice
 ### Performance Options
 
 - `--device DEVICE`: Device to use (default: "cpu", you may not get a speedup by using a gpu since it's a small model)
+- `--quantize`: Use int8 quantization for the model (default: False). This can reduce memory usage and increase speed, with minimal impact on audio quality.
 - `--quiet`, `-q`: Disable logging output
 
 ## Examples
@@ -79,7 +81,7 @@ pocket-tts generate --eos-threshold -3.0
 
 If you'd like to override the paths from which the models are loaded, you can provide a custom YAML configuration.
 
-Copy pocket_tts/config/b6369a24.yaml and change weights_path:, weights_path_without_voice_cloning: and tokenizer_path: to the paths of the models you want to load.
+Copy one of the files in `pocket_tts/config` (for example `pocket_tts/config/english.yaml`) and change `weights_path`, `weights_path_without_voice_cloning`, and `tokenizer_path` to the paths of the models you want to load.
 
 Then, use the --config option to point to your newly created config.