Need help include downloaded js files

[vanlong441]

I need to include a dictionary into my nodebb forum and this is the provided code

<script language="JavaScript">
<!--
var dictionaries = "ev_ve";
// -->
</script>
<script language="JavaScript1.2" src="http://vndic.net/js/vndic.js" type='text/javascript'></script>

Currently, I have to copy exactly the above lines into this file /root/nodebb/node_modules/nodebb-theme-persona/templates/footer.tpl/

How do I safely and correctly include external scripts?

**Update: I tried including it in this file /root/nodebb/node_modules/nodebb-theme-persona/plugin.json but apparently, the script tag needs to have these attributes in order for it to work language="JavaScript1.2" type='text/javascript'
{
"id": "nodebb-theme-persona",
"library": "library.js",
"hooks": [
{ "hook": "filter:teasers.get", "method": "getTeasers" },
{ "hook": "filter:widgets.getAreas", "method": "defineWidgetAreas" },
{ "hook": "filter:config.get", "method": "getThemeConfig" },
{ "hook": "static:app.load", "method": "init" },
{ "hook": "filter:admin.header.build", "method": "addAdminNavigation" },
{ "hook": "filter:topic.build", "method": "addUserToTopic" },
{ "hook": "filter:meta.getLinkTags", "method": "getLinkTags"}
],
"scripts": [
"lib/persona.js",
"lib/modules/nprogress.js",
"lib/modules/autohidingnavbar.min.js",
"lib/modules/quickreply.js"
],
"modules": {
"pulling.js": "node_modules/pulling/build/pulling-drawer.js"
},
"acpScripts": [
"lib/admin.js"
]
}

[PitaJ]

You could try including them in the Custom Header at ACP -> Appearance --> Custom Content