2. Language switching test

Language switching test

Add the ability to switch between Japanese and English.
When accessed from English-speaking countries, English will be displayed, and when accessed from Japan, Japanese will be displayed.
A switch can be added to the header menu to allow users to switch between the two by themselves.
This measure will also have an SEO effect in English-speaking countries.
We will try adding the switch to the menu after we have all the English/Japanese text, but for now
We will try to place the switch in this test page.