In a previous post, I wrote "Japanese words always end in a vowel." In a previous post, I wrote "Japanese words always end in a vowel."

In my previous post, I wrote: "Japanese words always end in a vowel." In my previous post, I wrote: "Japanese words always end in a vowel."

In a previous post, I wrote "Japanese words always end in a vowel." In a previous post, I wrote "Japanese words always end in a vowel."

In a previous post, I wrote "Japanese words always end in a vowel." In a previous post, I wrote "Japanese words always end in a vowel."

(I'm so sorry that, but) I meant to say “syllables,” not “words.” (I'm so sorry, but) I meant to say “syllables,” not “words.”

"I'm sorry that X" would imply that X is the thing that caused the need to apologise, but actually you're providing the correction here, so a contrasting word like "but" is better to join these clauses. Also in general, in Japanese people use apology words like すみません・すまん and ごめん a lot more lightly than English speakers use apologies. "I'm so sorry" is a pretty strong apology, so it sounds a little excessive for a clarification of a previous sentence.

I'm so sorry that, I meant to say “syllables,” not “words.” I'm so sorry, I meant to say “syllables,” not “words.”

I'm so sorry tha, but I meant to say “syllables,”, not “words.” I'm so sorry, but I meant to say “syllables”, not “words.”

The correct sentence is " Japanese syllables always end in a vowel." The correct sentence is "Japanese syllables always end in a vowel."

Note that we don't have a space after opening quotes. Also, ん would not be considered as ending in a vowel by English speakers.

Regarding the matter, I'd like to add a supplementto what I wrote. Regarding the matter, I'd like to add to what I wrote.

Regarding theis matter, I'd like to add a supplementelaborate further. Regarding this matter, I'd like to elaborate further.

Regarding the matteris post, I'd like to add a supplement. Regarding this post, I'd like to add a supplement.

Using "the matter" here could refer to Japanese syllables or your previous post. So my correction clarifies which you are talking about.

I can't catch what native speakers say, so I use English subtitles. I can't catch what native speakers say, so I use English subtitles.

It's also difficult for native speakers like me, especially the American accent.

It's hard for me to catch and pronounce particularly linking sounds in particular. It's hard for me to catch and pronounce linking sounds in particular.

"particularly linking sounds" is applying particularly to "linking" which sounds a little weird, since it would imply things can be "more linking" or "less linking". "In particular" as a suffix is more natural.

It's especially hard for me to catch and pronounce particularly linking soundssyllables with a lot of sounds clustered together. It's especially hard for me to catch and pronounce syllables with a lot of sounds clustered together.

It's particularly hard for me to catch and pronounce particularly linking sounds. It's particularly hard for me to catch and pronounce linking sounds.

So, I've used Google Translate to check whether my linking sounds awere correct. So, I've used Google Translate to check whether my linking sounds were correct.