{{- $class := .Get "class" | default ""  -}}
{{- $link := .Get "link" -}}
{{- $lang := .Get "lang" -}}
{{- $refLink := ref . (dict "path" $link "lang" $lang) }}

<a class="btn btn-lg col-sm-3 mb-3 font-weight-bold {{ $class }} " href="{{ $refLink }}">
   {{ .Get "label" }}
</a>