Change your Apple Watch language in a flash
This tip won’t help everyone, but it should be a huge timesaver for multilingual users: You can change your Apple Watch language for Messages with just a couple quick taps. And you can do it directly on the device without having to go into the companion app on your phone.
Here’s how to make it happen.
You’ll have to have done a little prep work on your iPhone before you can switch between languages in Messages. But the good news is that if this tip applies to you, odds are you’ve already done it. All you need to do is go to Settings > General > Keyboards > Keyboards (again) on your iPhone and add the language set you want to use. Keep in mind that the iPhone has way more language options than the Watch, so this trick will only work on ones available on both of them.
Normally, if you want to change the language on your Apple Watch, you’ll need to open the Watch app and go to My Watch > General > Language & Region to make your selection. But we can do better than that.
Instead, once you have a compatible keyboard set up on your iPhone, open Messages on your Apple Watch and pick a conversation thread. Tap on Reply, and then Force Touch to pull up an icon that will prompt you to choose your language. The Apple Watch will show your list of available keyboards, and then you just have to pick the one you want to use.
Note that you’ll still need to go through all of those other steps to switch the display language; this process only lets you create replies in Messages. But the really cool part — and, admittedly, the main reason you’d want to do this — is that these few taps also adjust Siri, so you can dictate a reply if one of the canned ones doesn’t cut it.