[MC-59515] Previous output for /tellraw (also with /setblock) messed up for languages having different syntax than English (example German)

I made this for German so probably not everyone will understand the bug

1. Perform this command with a command block (the mistake is intended):

/give @a sign 1 0 {BlockEntityTag:{Text1:"{\"text\":\"\",\"extra\":[{\"text\":\"CLICK\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/tellraw @p {text:"Hi"}\"}}]}",id:"Sign"}}

(Partwise made with: http://ezekielelin.com/tellraw/#addExtraModalData )

This will give this output:

[14:19:52] Kann NBT-Daten Unexpected token 'H' at: Hi"}\"}}]}",id:"Sign" nicht analysieren

Also with unbalanced quotation

It should rather be:

[14:19:52] Kann NBT-Daten nicht analysieren: Unexpected token 'H' at: Hi"}\"}}]}",id:"Sign"

2. Also with:

/setblock ~ ~ ~-3 command_block 0 {Command:"/setblock ~ 257 ~ command_block"}

This is the output:

[12:07:38] Kann NBT-Daten Invalid tag encountered, expected '{' as first char. nicht analysieren

It should rather be:

[12:07:38] Kann NBT-Daten nicht analysieren: Invalid tag encountered, expected '{' as first char

I know that there is a translation suggestion page but I think this is a bug with the syntax and not the translation