Hi dev.
About the letter.
Please do not forget those who can not speak English.
Because I can not speak English, this sentence is written in google translation.
The topic here can be read with little knowledge and google translation, but I can not write letters to children.
(Because it is translated into strange sentences like this post.)
It may not be a concern at this stage, but forcing a letter may exclude someone who can not speak English in the future.
I love this coin and I do not think that constraints due to not writing a letter are bad.
I also know that it is impossible to respond to multiple languages at this stage.
So if you are thinking of too stringent constraints in the future, please think about those who can not speak English.
This is my hope and a positive proposal.
Thanks.