yoastseo-dep/src/languageProcessing/languages/ru/config/syllables.json

Yoast clientside page analysis

{
  "vowels": "аоиеёэыуюя",
  "deviations": {
    "vowels": [
      {
        "fragments": [ "[аоиеёэыуюя][аоиеёэыуюя]" ],
        "countModifier": 1
      },
      {
        "fragments": [ "[аоиеёэыуюя][аоиеёэыуюя][аоиеёэыуюя]" ],
        "countModifier": 1
      }
    ],
    "words": {
      "full": [],
      "fragments": []
    }
  }
}