Today, I learned that it's taboo to use Japanese punctuation in a congratulatory address such as an invitation to thea wedding.

Instead of themusing punctuation, it's necessary to insert spaces.

Or: "Instead, it's necessary to insert spaces."

This is because punctuation marks mean the end of separation, so they are ominous.

Personally, I think this rule is too nervous.

While "nervous" makes sense, "apprehensive" or "superstitious," as the other corrector used, might work better. Also, this sentence does not need "Personally" since you also wrote "I think," which tells the reader is your opinion. But either way is good.

Today, I learned it's taboo to use Japanese punctuation in a congratulatory address, such as an invitation to thea wedding.

Instead of thempunctuation, it's necessary to insert spaces.

This is because punctuations means the end of separation, so they areit is ominous.

Personally, I think this rule is too nervsuperstitious.