Thankyou, that fixed it! Didn't realise I had done that. On the web client, there's a little note above the languages list that says "Warning: If you deselect Undetermined, you will not see most content." This confused me because I thought it was saying that "undetermined" needed to be selected in order to see most content. So after clicking another language, I re-selected "Undetermined" to make sure the language would remain as it was. So I think the wording of the little note mislead me and caused me to do the wrong thing. I clicked "Save" after that, not knowing that I'd disabled English posts.

I still don't fully understand that little note, because if I select English, then "Undetermined" is automatically deselected; but I still see most content (including what's on my profile). But if I specifically select "Undetermined" and save the changes, than the posts become invisible, even though that's what the note seemed to be trying to make sure I did.

The note seems to be saying "Keep Undetermined selected" in order to keep seeing most content, while in reality, selecting "Undetermined" makes most content disappear. Do you see what I'm trying to say?

Edit: Re-worded some of the second paragraph and split it into two, because I had an incomplete sentence that didn't make sense. Oops; ironic.

Thanks, but no. I've realised now that I accidentally deselected English as a language option and saved changes (I saved changes because I was testing the "Auto expand media" option). But I was a bit mislead by the little note above the languages which says "Warning: If you deselect Undetermined, you will not see most content.". It made me think that I needed to make sure that "Undetermined" is selected in order to keep seeing most content, because that's what it sounds like in its wording. So I re-selected "Undetermined" and saved changes, and it caused my posts to disappear; I just didn't notice immediately because I was busy transferring my subscriptions from this account over to my new one. I'm still not sure what that note was trying to say, but I've fixed it now by selecting English.

What makes it a bit more confusing is that when I select English, "Undetermined" becomes deselected, which is what the note is telling you not to do; this must be what compelled me to select "undetermined", because selecting anything else deselected "Undetermined". It's only after you save and completely refresh the page, that "Undetermined" suddenly becomes re-selected again, but English also remains selected at the same time.