Langogo AI Translator is an online translator and does not support offline translation which is much less accurate. 

Langogo AI translator is always connected and offers free online translation thanks to its e-SIM technology. With the e-SIM, Langogo provides an extra feature that you can also share Wi-Fi Hotspot to phones and other devices. The data plan is available on Langogo AI translation device. Please feel free to purchase it with WiFi or mobile data connection. You may check below to learn more about the data plan and other fees.