Installation:

• Download the extender from here
• Extract DWrite.dll to the Baldurs Gate 3\bin directory (eg. C:\Program Files (x86)\Steam\steamapps\common\Baldurs Gate 3\bin)

Linux (Proton) additional instructions (DO NOT DO THIS IF YOU ARE ON WINDOWS!)

• Right-click the game in the games library in Steam
• Click Properties...
• Click SET LAUNCH OPTIONS... button
• Enter WINEDLLOVERRIDES="DWrite.dll=n,b" %command%