vikunja-frontend/src/models/constants/relationKinds.json

{
  "subtask": [
    "Subtask",
    "Subtasks"
  ],
  "parenttask": [
    "Parent Task",
    "Parent Tasks"
  ],
  "related": [
    "Related Task",
    "Related Tasks"
  ],
  "duplicateof": [
    "Duplicate Of",
    "Duplicates Of"
  ],
  "duplicates": [
    "Duplicates",
    "Duplicates"
  ],
  "blocking": [
    "Blocking",
    "Blocking"
  ],
  "blocked": [
    "Blocked By",
    "Blocked By"
  ],
  "precedes": [
    "Precedes",
    "Precedes"
  ],
  "follows": [
    "Follows",
    "Follows"
  ],
  "copiedfrom": [
    "Copied From",
    "Copied From"
  ],
  "copiedto": [
    "Copied To",
    "Copied To"
  ]
}