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Why using babel with beamer produce warnings about rmfamily and ttfamily


Write a class with language dependent stringsCyrillic sans font in beamer (LyX)Did the “Computer Modern” font families become a default because they're well tested and proven, or chance?Using an OTF font with beamer and lualatexLaTeX beamer: pagenumbering appendixCan we stop recommending fontspec as first choice in case lualatex is used?Who changed my Chinese character?Warnings when using babel with LuaLaTeX






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty
margin-bottom:0;









1

















I have babel v3.34 a simple example with beamer which I have added a sans serif font family with babelfontsf[Language=Default]DejaVu Serif produce such warnings




Package babel Warning: The following fonts are not babel standard
families:



  • rmfamily / lmr [lmroman10-regular]:+tlig; at 10.95pt

  • ttfamily / lmtt [lmmono10-regular]: at 10.95pt

    There is nothing intrinsically wrong with it, but 'babel' will no set Script and
    Language. Consider defining a new family with babelfont.



documentclassbeamer
usepackage[english]babel
babelfontsf[Language=Default]Deja Vu Serif

begindocument
beginframe
Test
endframe

enddocument


Why I need to add a roman font family and a teletype font family?



( equivalent MWE with fontspec produce result without any warnings )



@JavierBezos










share|improve this question


































    1

















    I have babel v3.34 a simple example with beamer which I have added a sans serif font family with babelfontsf[Language=Default]DejaVu Serif produce such warnings




    Package babel Warning: The following fonts are not babel standard
    families:



    • rmfamily / lmr [lmroman10-regular]:+tlig; at 10.95pt

    • ttfamily / lmtt [lmmono10-regular]: at 10.95pt

      There is nothing intrinsically wrong with it, but 'babel' will no set Script and
      Language. Consider defining a new family with babelfont.



    documentclassbeamer
    usepackage[english]babel
    babelfontsf[Language=Default]Deja Vu Serif

    begindocument
    beginframe
    Test
    endframe

    enddocument


    Why I need to add a roman font family and a teletype font family?



    ( equivalent MWE with fontspec produce result without any warnings )



    @JavierBezos










    share|improve this question






























      1












      1








      1








      I have babel v3.34 a simple example with beamer which I have added a sans serif font family with babelfontsf[Language=Default]DejaVu Serif produce such warnings




      Package babel Warning: The following fonts are not babel standard
      families:



      • rmfamily / lmr [lmroman10-regular]:+tlig; at 10.95pt

      • ttfamily / lmtt [lmmono10-regular]: at 10.95pt

        There is nothing intrinsically wrong with it, but 'babel' will no set Script and
        Language. Consider defining a new family with babelfont.



      documentclassbeamer
      usepackage[english]babel
      babelfontsf[Language=Default]Deja Vu Serif

      begindocument
      beginframe
      Test
      endframe

      enddocument


      Why I need to add a roman font family and a teletype font family?



      ( equivalent MWE with fontspec produce result without any warnings )



      @JavierBezos










      share|improve this question
















      I have babel v3.34 a simple example with beamer which I have added a sans serif font family with babelfontsf[Language=Default]DejaVu Serif produce such warnings




      Package babel Warning: The following fonts are not babel standard
      families:



      • rmfamily / lmr [lmroman10-regular]:+tlig; at 10.95pt

      • ttfamily / lmtt [lmmono10-regular]: at 10.95pt

        There is nothing intrinsically wrong with it, but 'babel' will no set Script and
        Language. Consider defining a new family with babelfont.



      documentclassbeamer
      usepackage[english]babel
      babelfontsf[Language=Default]Deja Vu Serif

      begindocument
      beginframe
      Test
      endframe

      enddocument


      Why I need to add a roman font family and a teletype font family?



      ( equivalent MWE with fontspec produce result without any warnings )



      @JavierBezos







      beamer fonts luatex babel






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question



      share|improve this question








      edited 4 hours ago







      Salim Bou

















      asked 8 hours ago









      Salim BouSalim Bou

      12.1k1 gold badge16 silver badges44 bronze badges




      12.1k1 gold badge16 silver badges44 bronze badges























          1 Answer
          1






          active

          oldest

          votes


















          4


















          The package babel is informing you that you lack definitions for the serif family and the mono family.



          documentclassbeamer
          usefontthemeprofessionalfonts
          usepackage[english]babel
          babelfontrm[Language=Default]DejaVu Serif
          babelfontsf[Language=Default]DejaVu Serif
          babelfonttt[Language=Default]DejaVu Sans Mono

          begindocument
          beginframe
          Test
          endframe

          enddocument





          share|improve this answer


























          • Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

            – Salim Bou
            8 hours ago












          • @SalimBou Apparently you need to. It should be asked to Javier why.

            – egreg
            8 hours ago













          Your Answer








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          1 Answer
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          active

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          active

          oldest

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          4


















          The package babel is informing you that you lack definitions for the serif family and the mono family.



          documentclassbeamer
          usefontthemeprofessionalfonts
          usepackage[english]babel
          babelfontrm[Language=Default]DejaVu Serif
          babelfontsf[Language=Default]DejaVu Serif
          babelfonttt[Language=Default]DejaVu Sans Mono

          begindocument
          beginframe
          Test
          endframe

          enddocument





          share|improve this answer


























          • Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

            – Salim Bou
            8 hours ago












          • @SalimBou Apparently you need to. It should be asked to Javier why.

            – egreg
            8 hours ago
















          4


















          The package babel is informing you that you lack definitions for the serif family and the mono family.



          documentclassbeamer
          usefontthemeprofessionalfonts
          usepackage[english]babel
          babelfontrm[Language=Default]DejaVu Serif
          babelfontsf[Language=Default]DejaVu Serif
          babelfonttt[Language=Default]DejaVu Sans Mono

          begindocument
          beginframe
          Test
          endframe

          enddocument





          share|improve this answer


























          • Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

            – Salim Bou
            8 hours ago












          • @SalimBou Apparently you need to. It should be asked to Javier why.

            – egreg
            8 hours ago














          4














          4










          4









          The package babel is informing you that you lack definitions for the serif family and the mono family.



          documentclassbeamer
          usefontthemeprofessionalfonts
          usepackage[english]babel
          babelfontrm[Language=Default]DejaVu Serif
          babelfontsf[Language=Default]DejaVu Serif
          babelfonttt[Language=Default]DejaVu Sans Mono

          begindocument
          beginframe
          Test
          endframe

          enddocument





          share|improve this answer














          The package babel is informing you that you lack definitions for the serif family and the mono family.



          documentclassbeamer
          usefontthemeprofessionalfonts
          usepackage[english]babel
          babelfontrm[Language=Default]DejaVu Serif
          babelfontsf[Language=Default]DejaVu Serif
          babelfonttt[Language=Default]DejaVu Sans Mono

          begindocument
          beginframe
          Test
          endframe

          enddocument






          share|improve this answer













          share|improve this answer




          share|improve this answer



          share|improve this answer










          answered 8 hours ago









          egregegreg

          773k92 gold badges2017 silver badges3379 bronze badges




          773k92 gold badges2017 silver badges3379 bronze badges















          • Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

            – Salim Bou
            8 hours ago












          • @SalimBou Apparently you need to. It should be asked to Javier why.

            – egreg
            8 hours ago


















          • Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

            – Salim Bou
            8 hours ago












          • @SalimBou Apparently you need to. It should be asked to Javier why.

            – egreg
            8 hours ago

















          Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

          – Salim Bou
          8 hours ago






          Thanks for your response but my question is why babel requests rmfamily and a ttfamily font? I thought we just need a sans serif font with beamer. With fontspec we add just the sans serif family.

          – Salim Bou
          8 hours ago














          @SalimBou Apparently you need to. It should be asked to Javier why.

          – egreg
          8 hours ago






          @SalimBou Apparently you need to. It should be asked to Javier why.

          – egreg
          8 hours ago



















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