What happened to the URL on file for InterSub?

URL unreachable The URL on file (https://lingotheory.com) did not respond across three consecutive checks; the streak completed on 2026-09-27.

This reports what that URL did, not a claim that InterSub itself is gone: the address on file does not confidently match InterSub's own domain, so if it turns out to be a marketplace or listing page rather than InterSub's own site, this observation is still accurate about the URL, just not about the product. See the methodology for how the match is made.

The vendor's own description, unedited:
InterSub is a browser extension designed for language learning and skill acquisition. It offers interactive dual subtitles and instant word translations on popular streaming and educational platforms like YouTube, Netflix, Prime Video, Udemy, Coursera, LinkedIn Learning, and TED. InterSub helps users learn new words easily while watching videos, automatically saving viewed words to a personal vocabulary.

Live alternatives

LingoLeap verified listing → SmallTalk2Me verified listing → Trancy verified listing →

How this was decided

Not an editorial call. The URL on file failed three consecutive checks, with a confirmation re-probe before the streak counted (a bot-wall response never counts as one), and the 3-miss rule marks the listing discontinued automatically. If the URL responds again, the registry restores it on its own: warn first, then active. Both directions are recorded as events.

Spot an error? Tell us. Corrections to the record append, they never rewrite.