This issue was discussed previously here, but I decided to create a new thread, as this issue is a bit outside its original scope. I created a simple test with a single rte with a single link that I pointed at itself to rule out the possibility of a missing relation. When I run it through translation, it continues to point at the original version of the page and not the translated one. Below is the debug result from the link update attempt.

2019-02-27 13:00:27,825 [P10804/D11/T69] DEBUG Jumoo.TranslationManager.LinkUpdater.LinkUpdater - Setting : [bodyText] (Source:{
  "name": "1 column layout",
  "sections": [
    {
      "grid": 12,
      "rows": [
        {
          "label": "1 Column",
          "name": "1 Column",
          "areas": [
            {
              "grid": 12,
              "hasConfig": false,
              "controls": [
                {
                  "value": "<p><a data-udi=\"umb://document/2f11551a92414c7da1ba8ff19b6aeb13\" href=\"/{localLink:umb://document/2f11551a92414c7da1ba8ff19b6aeb13}\" title=\"A New Test\">Test link</a></p>",
                  "editor": {
                    "alias": "rte"
                  },
                  "active": true
                }
              ],
              "hasActiveChild": true,
              "active": true
            }
          ],
          "hasConfig": false,
          "id": "79c2a8aa-a08b-5138-b0ac-1e5d7cd6f792",
          "hasActiveChild": true,
          "active": true
        }
      ]
    }
  ]
}) [{
  "name": "1 column layout",
  "sections": [
    {
      "grid": "12",
      "rows": [
        {
          "label": "1 Column",
          "name": "1 Column",
          "hasConfig": false,
          "id": "79c2a8aa-a08b-5138-b0ac-1e5d7cd6f792",
          "areas": [
            {
              "grid": "12",
              "hasConfig": false,
              "controls": [
                {
                  "value": "<p>\n                    <a data-udi=\"umb://document/2f11551a92414c7da1ba8ff19b6aeb13\" href=\"/{localLink:umb://document/2f11551a92414c7da1ba8ff19b6aeb13}\" title=\"Spanish New Test\">Test link</a>\n                  </p>",
                  "editor": {
                    "alias": "rte"
                  },
                  "active": true
                }
              ],
              "hasActiveChild": true,
              "active": true
            }
          ],
          "hasActiveChild": true,
          "active": true
        }
      ]
    }
  ]
} > {
  "name": "1 column layout",
  "sections": [
    {
      "grid": "12",
      "rows": [
        {
          "label": "1 Column",
          "name": "1 Column",
          "hasConfig": false,
          "id": "79c2a8aa-a08b-5138-b0ac-1e5d7cd6f792",
          "areas": [
            {
              "grid": "12",
              "hasConfig": false,
              "controls": [
                {
                  "value": "<p>\n                    <a data-udi=\"umb://document/2f11551a92414c7da1ba8ff19b6aeb13\" href=\"/{localLink:umb://document/2f11551a92414c7da1ba8ff19b6aeb13}\" title=\"Spanish New Test\">Test link</a>\n                  </p>",
                  "editor": {
                    "alias": "rte"
                  },
                  "active": true
                }
              ],
              "hasActiveChild": true,
              "active": true
            }
          ],
          "hasActiveChild": true,
          "active": true
        }
      ]
    }
  ]
}]

Also, this is the xliff file I uploads for the translation.

<?xml version="1.0" encoding="utf-8"?>
<xliff srcLang="en-US" trgLang="es" version="2.0" xmlns="urn:oasis:names:tc:xliff:document:2.0">
  <file id="f1" original="2535|A New Test">
    <group id="g1" name="content">
      <group id="g2" name="3761|bodyText">
        <group id="g3" name="79c2a8aa-a08b-5138-b0ac-1e5d7cd6f792">
          <group id="g4" name="Umbraco.Grid.rte_1">
            <group id="u1-g" name="html">
              <unit id="u1-1" name="p">
                <originalData>
                  <data id="d1">&lt;a data-udi="umb://document/2f11551a92414c7da1ba8ff19b6aeb13" href="/{localLink:umb://document/2f11551a92414c7da1ba8ff19b6aeb13}" title="A New Test"&gt;</data>
                  <data id="d2">&lt;/a&gt;</data>
                </originalData>
                <segment>
                  <source>
                    <pc dataRefEnd="d2" dataRefStart="d1" id="1" type="link">Test link</pc>
                  </source>
                  <target>
                    <pc dataRefEnd="d2" dataRefStart="d1" id="1" type="link">Spanish test link</pc>
                  </target>
                </segment>
              </unit>
            </group>
            <group id="g5" name="0_Umbraco.TinyMCEv3.Tag">
              <unit id="u2" name="title">
                <segment>
                  <source>A New Test</source>
                  <target>Spanish New Test</target>
                </segment>
              </unit>
            </group>
          </group>
        </group>
      </group>
    </group>
  </file>
</xliff>

The newly created translated page updates the title of the link, but fails to change the link text or the location it points to. Is this a bug or is it just an issue with the xliff changes I'm testing with?