Just install and use! Enter commands from the keyboard or the buttons, and the plugin decides to switch the language or not. No need to monitor the current state of the keyboard. You can use short commands.

To configure the program, enter the AutoLNG command. After its launch, you will see the following options: 

• Yes - enable automatic switching. The program itself will turn on immediately after installation if two or more keyboard layouts are installed on your system.
• No - temporarily block the switch.
• Language - the option sets the language of the keyboard layout to which switching occurs, i.e. your native language. The program will display a new set of options for choosing one of the languages known to the program:
  • AR or عرب - Arabic,
  • BY or Бе - Belarusian,
  • CH or 中國 - Chinese Taiwan,
  • ZH or 中国 - Chinese PRC,
  • CS or ČE - Czech,
  • DE or Ge - German,
  • ES or Sp - Spanish,
  • FR - French,
  • HE or עִברִית - Hebrew,
  • HY or ՀԱ - Armenian,
  • JA or 日本 - Japanese,
  • KO or 한국 - Korean,
  • RO - Romanian,
  • RU or Ру - Russian,
  • SK or Sl - Slovak,
  • TR or TÜ - Turkish,
  • UA or Ук - Ukrainian
• System - the second language of the Windows keyboard (except English). The program uses this language by default.
• Another - you can enter any language. Entered as a hexadecimal number. Codes can be found here https://autoit-script.ru/docs/appendix/oslangcodes.htm in the hex column. Some languages can be entered as one or two letters names. Asterisk - return to the default setting (equivalent to Sy - system language)
• Main - language selection for Autodesk® AutoCAD® control. This language will be automatically switched after the end of the text input commands. That is, it is the language in which you enter the names of commands and options on the command line. It may not necessarily be English. To control English AutoCAD, you can use any language containing standard Latin letters. for example, Slovak or Polish. The default localization language is AutoCAD. You can select another language from the list or by entering the language code (see above).
• Commands - Enter a list of switch commands. Paste the full list of commands on which you want to switch the language to the command line. By default, there is such a list: TEXT, DTEXT, DDEDIT, MTEXT, MTEDIT, TABLEDIT, EATTEDIT, MLEADERCONTENTEDIT, MLEADER, SAVEAS, AMNOTE, AMPARTREF, AMPARTREFEDIT, AMLAYER, RENAME

Commands are entered into the list in large English letters without spaces, separated by commas. Use only full English command names. Short command names will not work. The program has no options to add/remove commands from the list. You should prepare the list in advance and enter it all at once. You can return to the default list by entering an asterisk * instead of the list.

You can find the settings for these commands in the A>V>C> Options Palette.