Figure 1.
Three-step process of identification of journals and exclusion of journals not meeting our inclusion criteria.
*Most journals not registered in WoS were single-language journals from Asia or Eastern Europe.
Figure 2.
IF without self-citations in relation to the share of English-language articles.
There was a moderate correlation: the greater the share of English-language articles, the higher the IF without self-citations (r = 0.56, p = <0.0001).
Figure 3.
Overall IF in relation to the share of English-language articles.
There was also a positive correlation with a weaker Pearson r (r = 0.47, p = <0.0001).
Figure 4.
Cites to years of IF calculation in relation to the share of English-language articles.
Even the total number of all cites cites showed an association with the share of English-language articles (r = 0.34, p = <0.0001).
Figure 5.
Share of self-citations in relation to the share of English-language articles.
There was a weak but negative correlation: the greater the share of English-language articles, the fewer self-citations (r = -0.2, p = 0.009).