Inspiration

Google Material Design	Monzo Tone of Voice	Microsoft Style Guide & Voice
IBM Content Design Guidelines	Apple Style Guide	NSW Government Writing Guidelines
University of Leeds Tone of Voice Guidelines	Slack Voice and Tone	Adobe Voice and Tone
Co-op Content guidelines	GOV.UK Voice & Style Guide	Atlassian Writing Style
MailChimp Content Style Guide	HubSpot Voice and Tone	Canada Post
intuit Voice and Style Guide	Monday Voice and Tone Guide	Salesforce Voice and Tone
PatternFly Content style guide	Shopify Voice and Tone	Buffer Voice and Tone Guide