Interagency Language Roundtable (IRL) Scale visit the ILR website ILR Level 3 Interagency Language Roundtable (IRL) Scale http://www.govtilr.org/Skills/ILRscale1.htm ACTFL ILR Level 4 ILR Level 3 ILR Level 4 Interagency Language Roundtable Interagency Language Roundtable (IRL) Scale ILR Scale. http://www.govtilr.org/Skills/ILRscale1.htm ILR Level 1 Interagency Language Roundtable http://www.govtilr.org/Skills/ILRscale1.htm ILR Skill Levels ILR Interagency Language Roundtable's