Description of the new feature / enhancement

Request for ”Keyboard Manager".
I'm a native Japanese user, so we need to implement switching to English/Japanese mode. By default, Windows assigns this setting a single key.
However, switching between English and Japanese with a single key is not useful, and I would like to assign two keys, such as left alt and right alt, namely left alt to make English mode and right alt to make Japanese mode.
At the same time, I'm a Vim user, so I would like to assign right alt + h to the left arrow, right alt + j to the down arrow, right alt + k to the up arrow, and right alt + l to the right arrow.
I really want the above feature on PowerToys as it is stable, whereas the famous AutoHotKey is not stable at all.
Summary:

• A single push of the left alt will be in English mode.
• A single push of the right alt will be in Japanese mode.

at the same time,

• right alt + h to be left arrow
• right alt + j to be down arrow
• right alt + k to be up arrow
• right alt + l to be right arrow

Scenario when this would be used?

Always.

Supporting information

In macOS, Karabiner-Elements ( https://karabiner-elements.pqrs.org/ ) does the feature.