The jsreport.exe is compiled with normal node without extra localization. I am not sure how the size would grow if we would compile the localization there.
I believe we should get it running with full node and the arg NODE_ICU_DATA as you get it working in normal node.
The problem could be that we fork extra process for templating engine evaluation and this process doesn't get the NODE_ICU_DATA propagated.
Could you please try to change the config in v2 as this and try again with NODE_ICU_DATA set?
"templatingEngines": {
"timeout": 10000,
"strategy": "in-process"
}
This would make templating engines running in the same node process.
I would try myself but wasn't able to quickly find that intl file, maybe you can link it here. Thanks.