You can check available fonts on your system by using --find_fonts with text2image, to find font names used by tesseract
text2image --find_fonts --text ./langdata/eng/eng.training_text --outputbase ./langdata/eng/ --min_coverage 0.999 --fonts_dir=./fonts/
Total chars = 6694
Font AA_NAGARI_SHREE_L3 failed with 1865 hits = 27.86%
Adobe Devanagari : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 0 to file ./langdata/eng/.Adobe_Devanagari.tif
Akchyarunicode : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 1 to file ./langdata/eng/.Akchyarunicode.tif
Akchyarunicode : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 2 to file ./langdata/eng/.Akchyarunicode.tif
Arial Heavy : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 3 to file ./langdata/eng/.Arial_Heavy.tif
Arial Italic Condensed : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 4 to file ./langdata/eng/.Arial_Italic_Condensed.tif
Arial Unicode MS : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 5 to file ./langdata/eng/.Arial_Unicode_MS.tif
Font BRH Devanagari failed with 6666 hits = 99.58%
Font BRH Devanagari Extra failed with 6666 hits = 99.58%
Font BRH Devanagari RN failed with 6666 hits = 99.58%
Calibri Bold Italic : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 6 to file ./langdata/eng/.Calibri_Bold_Italic.tif
Charter Indologique Capital : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 7 to file ./langdata/eng/.Charter_Indologique_Capital.tif
Courier New Italic : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 8 to file ./langdata/eng/.Courier_New_Italic.tif
Font GIST-DVOTKishor failed with 6645 hits = 99.27%
Font GIST-DVOTMohini failed with 6645 hits = 99.27%
Font GIST-MROTDhruv failed with 6645 hits = 99.27%
Font GIST-MROTVinit failed with 6645 hits = 99.27%
Font GIST-SDOTDhruv failed with 6645 hits = 99.27%
Font GIST-SDOTVinit failed with 6645 hits = 99.27%
Lohit Devanagari : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 9 to file ./langdata/eng/.Lohit_Devanagari.tif
Old Standard Indologique Bold : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 10 to file ./langdata/eng/.Old_Standard_Indologique_Bold.tif
Segoe UI : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 11 to file ./langdata/eng/.Segoe_UI.tif
Segoe UI Heavy : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 12 to file ./langdata/eng/.Segoe_UI_Heavy.tif
Font Sharad76 failed with 1510 hits = 22.56%
Shobhika : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 13 to file ./langdata/eng/.Shobhika.tif
Shobhika Bold : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 14 to file ./langdata/eng/.Shobhika_Bold.tif
Tahoma Bold : 6694 hits = 100.00%, raw = 112 = 100.00%
Rendered page 15 to file ./langdata/eng/.Tahoma_Bold.tif
Font Yashomudra failed with 6648 hits = 99.31%
Font Yashomudra Bold failed with 6648 hits = 99.31%
Font Yashomudra Bold Italic failed with 6648 hits = 99.31%
Font Yashomudra Italic failed with 6648 hits = 99.31%
Font YashomudraLight failed with 6648 hits = 99.31%
Font YashomudraLight Italic failed with 6648 hits = 99.31%
Font YashomudraMedium failed with 6648 hits = 99.31%
Font YashomudraMedium Italic failed with 6648 hits = 99.31%
Font YashomudraSemiBold Bold failed with 6648 hits = 99.31%
Font YashomudraSemiBold Bold Italic failed with 6648 hits = 99.31%