Tumblr
This is a step-by-step guide to add Vialog to your Tumblr site.

This is a step-by-step guide to add Vialog to your Tumblr site.
What you need:
What you get:
→ Using the build-in Search & Replace functionalities of Tumblr Edit HTML please make sure that you only use HTTPS.
Step 1: Change all "http" to "https".
Step 2: Search for "httpss". As multiple "s" characters may have been added, you need to clear those so that you only show "https".
→ Most likely the domain whitelisting is missing. Go to your Settings to add your allowed domain. You can also whitelist a domain on the bottom of the Discussion Settings page of your relevant discussion.
→ Go to your Dashboard to select your discussion, then under Discussion Settings you can find a "Language" dropdown. After selecting the language, save and publish changes and then either use Copy discussion code or the Share link with the updated language.