How can I hide the store switcher
For Magento 2, you can hide the store switcher by removing the store_switcher block. To remove the store_switcher block, extend the Magento_Theme default.xml file by creating the default.xml in your theme: app/design/frontend/your_vendor_name/your_theme_name/Magento_Theme/layout/default.xml
In the default.xml file:
<body>
<referenceBlock name="store_switcher" remove="true"/>
</body>
Then clear cache: bin/magento cache:clean