Can I use
?

Input Method Editor API

- WD

Provides scripted access to the Input Method Editor (IME). An IME is often used to input characters from East Asian languages by typing roman characters and selecting from the resulting suggestions.

IE

  1. 5.5 - 10: Not supported
  2. 11: Supported

Edge

  1. 12 - 18: Supported
  2. 79 - 86: Not supported
  3. 87: Not supported

Firefox

  1. 2 - 82: Not supported
  2. 83: Not supported
  3. 84 - 85: Not supported

Chrome

  1. 4 - 86: Not supported
  2. 87: Not supported
  3. 88 - 90: Not supported

Safari

  1. 3.1 - 13.1: Not supported
  2. 14: Not supported
  3. TP: Not supported

Opera

  1. 9 - 71: Not supported
  2. 72: Not supported

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Not supported

Blackberry Browser

  1. 7: Not supported
  2. 10: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 59: Not supported

Chrome for Android

  1. 86: Not supported

Firefox for Android

  1. 82: Not supported

IE Mobile

  1. 10: Not supported
  2. 11: Supported

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4 - 11.2: Not supported
  2. 12.0: Not supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
Building Better Input Experience for East Asian Users with the IME API in IE11