[Bug]: `Language already registered` error in the i18n demo when switching between docs pages

[sequba]

Description

Steps:

• Go to https://hyperformula.handsontable.com/guide/i18n-features.html#en-us-demo
• Click on a link to Localizing functions guide in the side menu
• Click on a link to Internationalization features guide in the side menu
• Scroll to demo

Video or screenshots

Demo

https://hyperformula.handsontable.com/guide/i18n-features.html

HyperFormula version

3.0.0

Your framework

No response

Your environment

Chrome