To embed variables in survey related to project, survey and respondent, the following can be used

Respondent name: ${respondent_name}

Respondent node: ${respondent_node_name}

Respondent email: ${respondent_email}

Respondents survey ISO language code: ${respondent_language_iso}

Company name the project belongs to: ${company_name} 

Project name: ${project_name}

Project contact name: ${project_contact_name}

Project contact email: ${project_contact_email}

Project contact phone: ${project_contact_phone}

Name of parent respondent: ${parentsurvey_respondent_name}

Email of parent respondent ${parentsurvey_respondent_email}

Current respondent role name (singular): ${role_name_singular}

Current respondent role name (plural): ${role_name_plural}