CONSER practice is to provide a variant title (246 field) for a portion of the title when a user might consider this portion to be the title proper or when an additional access point will improve overall access. (RDA 2.3.6; see also LC-PCC PS 2.3.6.3).
Parallel Titles. The Parallel title proper is a core PCC element according to LC-PCC PS 2.3.3. Give a variant access point for parallel titles appearing in the title statement or in a note, supplying a separate Variant Title (246) for each.
245 00 Revista interamericana de bibliografia = $b Review of inter-American bibliography.
246 11 Review of inter-American bibliography
If the Parallel title changes on later issues, supply the title (246 field) with the second indicator value set to “#” with a $i note explaining the situation.
245 00 $a Revista interamericana de bibliografía
246 11 $a Review of inter-American bibliography
246 1# $i Issues for 1952- have English title: $a Inter-American review of bibliography