attempt at making it work

src/i18n/compare

@@ -0,0 +1,49 @@
+//#!/usr/bin/env node
+const arg = process.argv[2]
+
+if (typeof arg === 'undefined') {
+  console.log('This is a very simple and tiny tool that checks en.json with any other language and')
+  console.log('outputs all the things present in english but missing in foreign language.')
+  console.log('')
+  console.log('Usage: ./compare.js <lang> ')
+  console.log('       or')
+  console.log('       node ./compare.js <lang>')
+  console.log('')
+  console.log('Where <lang> is name of .json file containing language. For ./fi.json it should be:')
+  console.log('      ./compare.js fi ')
+  console.log('')
+  console.log('Limitations: ')
+  console.log('* This program does not work with languages left over in messages.js')
+  console.log('* This program does not check for extra strings present in foreign language but missing')
+  console.log('  in english.js (for now)')
+  console.log('')
+  console.log('There are no other arguments or options. Make an issue if you encounter a bug or want')
+  console.log('some feature to be implemented. Merge requests are welcome as well.')
+  process.exit()
+}
+
+const english = require('./en.json')
+const foreign = require(`./${arg}.json`)
+
+function walker (a, b, path = []) {
+  Object.keys(a).forEach(k => {
+    const aVal = a[k]
+    const bVal = b[k]
+    const aType = typeof aVal
+    const bType = typeof bVal
+    const currentPath = [...path, k]
+    const article = aType[0] === 'o' ? 'an' : 'a'
+
+    if (bType === 'undefined') {
+      console.log(`Foreign language is missing ${article} ${aType} at path ${currentPath.join('.')}`)
+    } else if (aType === 'object') {
+      if (bType !== 'object') {
+        console.log(`Type mismatch! English has ${aType} while foreign has ${bType} at path ${currentPath.join['.']}`)
+      } else {
+        walker(aVal, bVal, currentPath)
+      }
+    }
+  })
+}
+
+walker(english, foreign)